W742S824 - Winbond Electronics

W742S824

4BIT MICROCONTROLLER, 8K×16ROM, 1K×4RAM

DTMF, 192-DOT LCD, 3-OPS

Publication Release Date: Nov 7, 200 5

- 1 - Revision A2

Table of Content-

1. GENERAL DESCRIPTION ......................................................................................................... 2

2. FEATURES................................................................................................................................. 2

3. PIN CONFIGURATION...............................................................................................................4

4. PIN DESCRIPTION..................................................................................................................... 5

5. BLOCK DIAGRAM...................................................................................................................... 6

6. ABSOLUTE MAXIMUM RATINGS ............................................................................................. 7

7. DC CHARACTERISTICS............................................................................................................ 7

7.1 DC CHARACTERISTICS: VDD-VSS=3.0V.................................................................... 7

7.2 DC CHARACTERISTICS: VDD-VSS=3.6V..................................................................10

8. AC CHARACTERISTICS.......................................................................................................... 10

9. APPLICATIONS INFORMATION.............................................................................................. 11

9.1 Operating Voltage......................................................................................................... 11

9.2 FSK Signal Detection and FSK Demodulation ............................................................. 11

9.2.1 FSK Signal Detection.................................................................................................11

9.2.2 FSK demodulation......................................................................................................11

10. REVISION HISTORY................................................................................................................12

W742S824

Publication Release Date: Nov 7, 200 5

- 2 - Revision A2

1. GENERAL DESCRIPTION

The W742S824 is a high-performance 4-bit micro-controller (μC) that provides an LCD driver and

three OpAmps. The device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in

dual-clock operation, a 24 × 8 LCD driver(including 4 segment can be configured to normal outputs by

mask option) , five 4-bit I/O ports (including 1 output port for LED driving), three OpAmps(Operational

Amplifiers), and one channel DTMF generator. There are also five interrupt sources and 8-levels

subroutine nesting for call subroutine or interrupt applications. The W742S824 operates on very low

current and has two power reduction modes, that is the dual-clock slow operation and STOP mode,

which help to minimize power dissipation .

2. FEATURES

y Operating voltage: 2.2V - 5.5V

y Dual-clock operation m ode (Connect to 32768 Hz crystal only)

− Fslow oscillator : 32768Hz OSC

− Ffast oscillator : PLL ( Phase Lock Loop ) output enable

y Memory

− 8192 x 16 bits program ROM (including 32K x 4 bit look-up tabl e)

− 1024 x 4 bits data RAM (including 16 nibble s x 16 pa ges working registers)

− 24 x 8 LCD data RAM

y 18 input/output pins

− Port for input only: 1 ports/2 pins(RC.2, RC.3)

− Input/output ports: 3 ports/12 pins(RA, RB & RD)

− High sink current output port for LED driving: 1 port /4 pins(RE)

y Power-down mode

− Hold function: no operation (excluding Fslow and Fosc oscillator)

− Stop function: no operation (Fslow a nd Fosc oscillator are stopped)

− Dual-clock slow operation mode: system is operated by 32768Hz (FOSC=Fslow and Ffast

stopped)

y Five types of interrupts

− Four internal interrupts (Div ider0, Divider1, Timer 0, Timer 1)

− One external interrupts (RC Port)

y LCD driver output

− 24 segments x 8 commons; SEG20~SEG23 can be u sed a s DC ou tput pins by mask option

− 1/8 duty, 1/4 bias B-type driving mode; bias voltages are generated by the internal re sistor

− 8 level software LCD contrast adjusting

y MFP output pin

− Output is software selectable as modulating or non-modulating freque ncy

− Works as frequency output specified by Timer 1

y DTMF output pin ( PLL should be enable in this functio n)

− Output is one channel Dual Tone Multi-Frequency signal for dialing

y Three OpAmps(Operation al Amplifiers)

− Three general purpose O pAmps with positive inputs, negative inpu ts and outputs.

W742S824

Publication Release Date: Nov 7, 200 5

- 3 - Revision A2

y Two built-in 14-bit frequency dividers

− Divider0: the clock source is the output of the Fosc-oscillator

− Divider1: the clock source is the output of the Fslow-oscillator

y Two built-in 8-bit programmable countdown timers

− Timer 0: one of two internal clock frequencies (FOSC/4 or FOS C/1 024) can be selected

− Timer 1: with auto-reload function and one of three internal clock frequencies (FOSC,

FOSC/64 or Fslow) can be selected by MR1 register; and the specified frequency can be

delivered to MFP pin

y Built-in 18/15-bit watchdog timer sele ctable for system reset and determined by code option

y Build-in Power-on reset detested circuit

y Powerful instru ct ion set: 1XX instructions

y 8-levels subroutine (include interrupt) n esting

y Total pad count: 66

W742S824

Publication Release Date: Nov 7, 200 5

- 4 - Revision A2

3. PIN CONFIGURATION

For W742S824 QFP 80 pin

12345678910 11 12 13 14 15 16 17 18 19

20 21 22 23 24

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41

RA2

RA3

RB0

RB1

RB2

RB3

RC2

RC3

RD0

RD1

RD2

RD3

SEG16

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

COM4

COM3

COM2

COM1

COM5

RE0

RE1

COM0

RE3

RE2

COM7

COM6

W742S824

Publication Release Date: Nov 7, 200 5

- 5 - Revision A2

4. PIN DESCRIPTION

SYMBOL I/O FUNCTION

XIN I Input pin for 32.768 KHz oscillator. Connected to 32.768 KHz crystal only.

XOUT O

Output pin for 32.768 KHz oscillator. Connected to 32.768 KHz crystal

only.

VXXF I Regulator for PLL circuit. Connected capacitor (10 uF) to VSS.

VF I Low pass filter for PLL circuit. Connected capacitor 0.022uF to VSS.

RA0-RA3 I/O

Input/Output port.

Input/output mode specified by port mode 1 register (PM1).

Internal pull-up resistors specified by RAM 7FEH

RB0-RB3 I/O

Input/Output port.

Input/output mode specified by port mode 2 register (PM2).

Internal pull-up resistors specified by RAM 7FFH

RC2-RC3 I

4-bit port for input only.

Each pin has an independent interrupt capability.

RD0-RD3 I/O

Input/Output port.

Input/output mode specified by port mode 5 register (PM5).

Internal pull-up resistors specified by RAM 7FCH

RE0-RE3 O Output port only. With high sink current capacity for the LED application.

MFP O

Output pin only.

This pin can output modulating or non-modulating freque ncy, or Timer 1

specified frequency. It can be sel ected by bit 0 of BUZCR (BUZCR. 0).

DTMF O This pin can output dual-tone multi frequency signal for dialing.

RES I System reset pin with low active.

SEG0-

SEG23 O LCD segment output pins. SEG20~SEG23 can be used as DC o utput port

by mask option

COM0-

COM7 O LCD common signal output pins.

The LCD alternating frequency can be selected by code optio n.

OPP1~3 I OpAmp1~3 positive input pins

OPN2~3 I OpAmp2~3 negative input pins

OPO3 O OpAmp3 output pins

TEST I For IC testing. Connected t o Vss in normal usage.

VDD I Positive power supply (+).

VSS I Negative power supply (-).

W742S824

Publication Release Date: Nov 7, 200 5

- 6 - Revision A2

5. BLOCK DIAGRAM

LCD

STACK

(8 Levels)

RAM

(1024*4)

Timer 0

(8 B it)

Tim ing G enerator

PORT

Modulation

Frequency

SEG0~SEG23 COM0~COM7

RA0-3

RB0-3

RC2-3

RD0-3

MFP

XIN

XOUT

VDD

VSS

ROM

(8192*16)

(look_up table

32K*4)

Timer 1

(8 B it)

RES

Divider 0

(14 B it)

Watch Dog

(4 B it)

HCF PEFHEFIEF

Central Control

Unit

EVF SEF

PSR0 SCR PR

MR0 MR1

. . .

PORT

MUX

SEL

+1(+2)

PORT

PM0

Divider 1

(

12/14 Bit

)

RE0-3

DTMF

Generator DTMF

PM1 DTMF DTCR

PLL

+ -

OPP2

OPN2 OPP3 OPN3 OPO3

1.15V

OPP1

RC1

RE3

RC0

VDD

VSS

W742S824

Publication Release Date: Nov 7, 200 5

- 7 - Revision A2

6. ABSOLUTE MAXIMUM RATINGS

PARAMETER RATING UNIT

Supply Voltage to Ground Potential -0.3 to +7.0 V

Applied Input/Output Voltage -0.3 to +7.0 V

Power Dissipation 120 mW

Ambient Operating Temperature 0 to +70 °C

Storage Temperature -55 to +150 °C

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversel y affect the life and reliability

of the device.

7. DC CHARACTERISTICS

7.1 DC CHARACTERISTICS: VDD-VSS=3.0V

(VDD-VSS = 3.0 V, Ffast = 3.6042MHz, Fslow = 32.768 KHz, Ta = 25° C, LCD on; Power-on reset circuit active, unless

otherwise specified)

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Op. Voltage VDD - 2.2 - 5.5 V

Op. Current (Crystal

type) IOP1 No load (Ext-V)

All OpAmps disabled

In dual-clock normal operation. - 0.7 1.0 mA

Op. Current (Crystal

type) IOP3

No load (Ext-V)

All OpAmps disabled

In dual-clock Fslow operation

and Ffast is stopped

- 45 65

μA

Op. Current (Crystal

type) IOP4

No load (Ext-V)

All OpAmps enabled

In dual-clock Fslow operation

and Ffast is stopped

- 70 80

μA

Hold Current (Crystal

type) IHM1 Hold mode No load (Ext-V)

All OpAmps disabled

In dual-clock normal operation - 310 450

μA

Hold Current (Crystal

type) IHM3

Hold mode No load (Ext-V)

All OpAmps disabled

In dual-clock Fslow operation

and Ffast is stopped

- 45 55

μA

W742S824

Publication Release Date: Nov 7, 200 5

- 8 - Revision A2

DC CHARACTERISTICS: VDD-VSS=3.0V, continued.

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Hold Current (Crystal

type) IHM4

Hold mode No load (Ext-V)

All OpAmps enabled

In dual-clock Fslow

operation and Ffast is

stopped

- 70 80 μA

Hold Current (Crystal

type) IHM5

Hold mode No load (Ext-V)

All OpAmps disabled

LCD off In dual-clock Fslow

operation and Ffast is

stopped

- 15 20 μA

Stop Current (Crystal

type) ISM1

Stop mode No load (Ext-V)

All OpAmps disabled

LCD driver should be

turned off

- 8 12 μA

Input Low Voltage VIL - VSS - 0.3VDD V

Input High Voltage VIH - 0.7VDD - VDD V

MFP Output Low

Voltage VML IOL = 6 mA - 0.2 0.4 V

MFP Output High

Voltage VMH IOH = 3mA 2.4 - - V

MFP Sink Current IML VOL = 0.9V 9 16 - mA

Port RA, RB and RD

Output Low Voltage VABL IOL = 2.0mA - - 0.4 V

Port RA, RB and RD

Output high Voltage VABH IOH = 2.0mA 2.4 - - V

LCD Supply Current ILCD All Seg. ON - - 30 μA

SEG0-SEG23 Sink

Current

(Used as LCD output) IOL1 VOL = 0.4V

VLCD = 0.0V 90 - - μA

SEG0-SEG23 Drive

Current

(Used as LCD output) IOH1 VOH = 2.4V

VLCD = 3.0V 90 - - μA

Port RE Sink Current IEL VOL = 0.9V 9 14 - mA

Port RE Source

Current IEH VOH = 2.4V 0.4 1.2 - mA

DTMF Output DC level VTDC RL=5KΩ, VDD=2.5 to 3.8V 1.1 - 2.8 V

DTMF Distortion THD RL=5KΩ, VDD=2.5 to 3.8V - -30 -23 dB

W742S824

Publication Release Date: Nov 7, 200 5

- 9 - Revision A2

DC CHARACTERISTICS: VDD-VSS=3.0V, continued.

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

DTMF Output Voltage VTO Low group, RL=5KΩ 130 150 170 mVrms

Pre-emphasis Col/Row 1 2 3 dB

Pull-up Resistor RA Port RA 100 450 1000 KΩ

Pull-up Resistor RB Port RB 100 450 1000 KΩ

Pull-up Resistor RC Port RC 100 450 1000 KΩ

Pull-up Resistor RD Port RD 100 450 1000 KΩ

Input Leakage

Current IIN Vss≤VIN ≤VDD - - 1

μA

Input

Resistance RIN 10 - - MΩ

OP-

AMPs

Input Offset

Voltage VOS - 10 25 mV

Maximum

Capacitive

Load CL - - 20 pF

OP3

Minimum

Resistive Load RL 1000 - - KΩ

W742S824

Publication Release Date: Nov 7, 200 5

- 10 - Revision A2

7.2 DC CHARACTERISTICS: VDD-VSS=3.6V

(VDD-VSS = 3.6 V, Ffast = 3.6042MHz, Fslow = 32.768 KHz, Ta = 25° C, LCD on; Power-on reset circuit active, unless

otherwise specified)

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Op. Current (Crystal

type) IOP1 No load (Ext-V)

All OpAmps disabled

In dual-clock normal operation. - 0.8 1.0 mA

Op. Current (Crystal

type) IOP3

No load (Ext-V)

All OpAmps disabled

In dual-clock Fslow operation

and Ffast is stopped

- 45 65

μA

Op. Current (Crystal

type) IOP4

No load (Ext-V)

All OpAmps enabled

In dual-clock Fslow operation

and Ffast is stopped

- 80 85

μA

Hold Current (Crystal

type) IHM1 Hold mode No load (Ext-V)

All OpAmps disabled

In dual-clock normal operation - 360 450

μA

Hold Current (Crystal

type) IHM3

Hold mode No load (Ext-V)

All OpAmps disabled

In dual-clock Fslow operation

and Ffast is stopped

- 55 65

μA

Hold Current (Crystal

type) IHM4

Hold mode No load (Ext-V)

All OpAmps enabled

In dual-clock Fslow operation

and Ffast is stopped

- 80 85

μA

Stop Current (Crystal

type) ISM1 Stop mode No load (Ext-V)

All OpAmps disabled

LCD driver should be turned off - 12 15

μA

8. AC CHARACTERISTICS

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Op. Frequency FOSC Crystal type - 32768 - KHz

PLL Frequency Ffast PLL enable - 3.6042 - MHz

Instruction cycle time TI One machine cycle - 4/FOSC - S

Reset Active Width TRAW FOSC=32.768 KHz 1 - - μS

Interrupt Active Width TIAW FOSC=32.768 KHz 1 - - μS

W742S824

Publication Release Date: Nov 7, 200 5

- 11 - Revision A2

9. APPLICATIONS INFORMATION

9.1 Operating Voltage

The chip can be operated from 2.2V-5.5V. If users have much consideration for low power operation,

lower voltage supply syste m can be a better choice.

9.2 FSK Signal Detection and FSK Demodulation

9.2.1 FSK Signal Detection

Figure 9-1 is a typical application circuit for FSK signal detection and FSK demodulation. For purpose

of signal detection, user should enable both OP2 and OP3, output low to control and sense the signal

by RC.n.

9.2.2 FSK demodulation

For purpose of FSK demodulation, user should enable both OP2 and OP3, output high to control, and

sense the FSK signal by RC.n. and demodulate FSK by software.

Figure 9-1 Application Circuit for FSK Signal Detection and FSK demodulation

W742S824

Publication Release Date: Nov 7, 200 5

- 12 - Revision A2

10. REVISION HISTORY

VERSION DATE PAGE DESCRITION

A1 June 1, 2005 - Initial Issued

A2 November 7, 2005 - Add IHM5 DC item

Important Notice

Winbond products are not designed, intended, authorized or warranted for use as components

in systems or equipment intended for surgical implantation, atomic energy control

instruments, airplane or spaceship instruments, transportation instruments, traffic signal

instruments, combustion control instruments, or for other applications intended to support or

sustain life. Further more, Winbond products are not intended for applications wherein failure

of Winbond products could result or lead to a situation wherein personal injury, death or

severe property or envi ronmental damage could occur.

Winbond customers using or selling these products for use in such applications do so at their

own risk and agree to fully indemnify Winbond for any damages resulting from such improper

use or sales.