W541E203 - Winbond Electronics

PRELIMINARY W541E20X

4-BIT FLASH EPROM MICROCONTROLLER

Publication Release Date: June 2003

- 1 - Revision A2

GENERAL DESCRIPTION

The W541E20X is fully compatible with W741E20X in terms of pin assignment and IC function. It is a

high-performance 4-bit microcontroller (µC) that provides an flash EEPROM for the program memory.

The device contains a 4-bit ALU, two 8-bit timers, a divider, a serial port, and five 4-bit I/O ports

(including 3 output port for LED driving). There are also seven interrupt sources and 8-level subroutine

nesting for interrupt applications. The W541E20X has two power reduction modes, hold mode and

stop mode, which help to minimize power dissipation.

The W541E20X is suitable for end product manufacturer engineering testing and earlier samples

before mass production.

FEATURES

• Operating voltage: 2.4V−5.5V

• Crystal or RC oscillation circuit can be selected by the code option

− Crystal/Ceramic oscillator: up to 4 MHz

− RC oscillator: up to 4 MHz

• Both in crystal or RC oscillator operation mode, high-frequency (400 KHz to 4 MHz) or low-frequency

(32.768 KHz) oscillation must be determined by the code option

• Memory

− 2048 × 16 bit program flash EEPROM (including 2K × 4 bit look-up table)

− 128 × 4 bit data RAM (including 16 working registers)

• 21 input/output pins

− Input/output ports: 4 ports/16 pins

− Serial input/output port: 1 port /4 pins (high sink current for LED driving)

- MFP output pin: 1 pin (MFP)

- Do not be floating when it is as input or output open-drain (NMOS type).

• Power-down mode

− Hold function: no operation (except for oscillator)

− Stop function: no operation (including oscillator)

• Seven types of interrupts

− Five internal interrupts (Divider 0, Timer 0, Timer 1, and Serial I/O)

− Two external interrupts (Port RC and INT pin)

• MFP output pin

− Output is software selectable as modulating or nonmodulating frequency

− Works as frequency output specified by Timer 1

• Built-in 14-bit clock frequency divider circuit

• Two built-in 8-bit programmable countdown timers

− Timer 0: One of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected

Preliminary W541E20X

- 2 -

− Timer 1: Offers auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64)

can be selected or falling edge of pin RC.0 can be selected (output through MFP pin)

• Built-in 18/14-bit watchdog timer selectable for system reset

• Powerful instruction set: 118 instructions

• 8-level subroutine (include interrupt) nesting

• One serial transmission/receiver port specified by software

• Up to 1 µS instruction cycle (with 4 MHz operating frequency)

• Packaged in 18-pin, 20-pin, 28-pin PDIP and 20-pin, 28-pin SOP

Preliminary W541E20X

Publication Release Date: June 2003

- 3 - Revision A2

BLOCK DIAGRAM

XIN XOUT

STACK

(8 Levels)

RAM

(128*4)

ALU

Timer 0

(8-bit)

Timing Generator

PORT RA

PORT RB

Modulation

Frequency

Pulse

RA0 to 3

RB0 to 3

RE0 to 3

MFP

VDD

VSS

Flash

EEPROM

(2048*16)

(look_up table

2K*4)

Timer 1

(8-bit)

ACC

Divider 0

(14-bit)

Watchdog Timer

(4-bit)

HCF

PEFHEFIEF

Central Control

Unit

EVF SEF

PSR0

MUX

SEL

+1(+2)

PORT RC RC0 to 3

PORT RD RD0 to 3

PR PM0MR0

PSR1 PSR2

PORT RT

Serial I/O MUX

(RE0/DOUT,

RE1/CLKO,

RE2/DIN,

RE3/CLKI)

SEL

VPP (RES)

MODE (INT)

DATA (RA3)

RES

INT

Preliminary W541E20X

- 4 -

PIN CONFIGURATIONS

RB3

RB2

RB1

VSS

RA1

RA0

XIN

XOUT

VDD

RC3

RC2

RC1

(Vpp) /RES

(MODE) /INT

(DATA) RA3

RA2

RB0

RC0

RE3

RE2

RE1

VSS

RA1

RA0

XIN

XOU

VDD

RD3

RD2

RD1

(Vpp) /RES

(MODE) /INT

(DATA) RA3

RA2

RE0

RD0

RB0 RC3

RB3

RB2

RB1 RC2

RC1

RC0

NC MFP

W541E201

W541E202/W541E205

18-PDIP (300 mil) 28 SKINNY (300 mil), 28 SOP

10 11

RB3

RB2

RB1

VSS

RA1

RA0

XIN

XOUT

VDD

RC3

RC2

RC1

(Vpp) /RES

(MODE) /INT

(DATA) RA3

RA2

RB0

RC0

W541E203

20-PDIP (300 mil)

VSS VDD

10 11

RB3

RB2

RB1

VSS

RA1

RA0

XIN

XOU

VDD

RC3

RC2

RC1

(Vpp) /RES

(MODE) /INT

(DATA) RA3

RA2

RB0

RC0

W541E204

20 SOP

VSS VDD

Preliminary W541E20X

Publication Release Date: June 2003

- 5 - Revision A2

PIN DESCRIPTION

SYMBOL I/O FUNCTION

XIN I

Input pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

External 10~20pF capacitor uses to get accurate freq in crystal mode.

XOUT O

Output pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

20pF capacitor is built in internal for crystal mode.

RA0−RA2,

RA3 (DATA)

I/O Input/Output port.

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

output port, can provide high sink current for driving LED.

RB0−RB3 I/O Input/Output port.

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

output port, can provide high sink current for driving LED.

RC0−RC3 I/O Input/Output port.

Input/output mode specified by port mode 4 register (PM4). Each pin has

an independent interrupt capability in input mode.

RD0−RD3 I/O Input/Output port.

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

RE0/DOUT,

RE1/CLKO,

RE2/DIN,

RE3/CLKI

I/O Special input/output port.

This port can be configured by software to act as the output of internal

port RT or the serial I/O port. When used as output port, can provide high

sink current for driving LED.

MFP O Output pin only.

This pin can output modulating or nonmodulating frequency, or Timer 1

clock output specified by mode register 1 (MR1).

INT (MODE)1 I External interrupt pin.

This pin must be tied to VDD through an external resistor. It is a low active

and floating input pin.

RES (VPP)1 I System reset pin.

This pin must be tied to VDD through an external resistor when it is not

used to reset this chip. It is a low active and floating input pin.

VDD I Positive power supply (+).

VSS I Negative power supply (-).

Note: There are internal pull-high resistors in these pins of W741C20X.

Preliminary W541E20X

- 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 adversely affect the life and reliability

of the device.

DC CHARACTERISTICS

(VDD-VSS = 3.0 V, Fosc. = 32.768 KHz, Ta = 25° C; unless otherwise specified)

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Op. Voltage VDD - 2.4 - 5.5 V

Op. Current (Crystal type) IOP1 No load (Ext-V) - 8.5 20 µA

Op. Current (RC type) IOP2 No load (Ext-V) - 36 65 µA

Hold Current (Crystal type) IHM1 Hold mode No

load (Ext-V) - 4 6

µA

Hold Current (RC type) IHM2 Hold mode No

load (Ext-V) - 16 40

µA

Stop Current (Crystal type) ISM1 Stop mode No

load (Ext-V) - 0.1 2 µA

Stop Current (RC type) ISM2 Stop mode

No load (Ext-V) - 0.1 2 µA

Input Low Voltage VIL - VSS - 0.3 VDD V

Input High Voltage VIH - 0.7 VDD - VDD V

MFP Output Low Voltage VML IOL = 3.5mA - - 0.4 V

MFP Output High Voltage VMH IOH = -3.5mA 2.4 - - V

Port RA, RB Sink Current IABL VOL = 0.9V 9 - - mA

Port RA, RB Source Current IABH VOH = 2.4V 0.4 1.2 - mA

Port RC, RD Output Low Voltage VCDL IOL = 2.0 mA - - 0.4 V

Port RC, RD Output High Voltage VCDH IOH = -2.0 mA 2.4 - - V

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

Port RE Source Current IEH VOH = 2.4V 0.4 1.2 - mA

DIN Pin Pull-up Resistor RDIN RE.2 used as

serial input pin 50 250 1000

KΩ

Preliminary W541E20X

Publication Release Date: June 2003

- 7 - Revision A2

AC CHARACTERISTICS

(VDD-VSS = 3.0 V, Ta = 25° C; unless otherwise specified)

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

RC type - - 4000

Op. Frequency Fosc Crystal type 1

(Option low speed

type)

- 32.768 - KHz

Crystal type 2

(Option high speed

type)

400 - 3580

Frequency Deviation by

Voltage Drop for low freq. RC

Oscillator

∆f

f(3V) - f(2.4V)

f(3V) - - 10 %

Instruction Cycle Time TI One machine cycle - 4/Fosc - S

Serial Port Data Ready Time TDR - 200 - - nS

Serial Port Data Hold Time TDH - 200 - - nS

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

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

Preliminary W541E20X

- 8 -

TYPICAL APPLICATION CIRCUIT

MFP

INT

RES

XOUT

XIN

RC2

RC3

RA0

RA3

Output Signal

RB0

RB1

RB2

RB3

RC0

RC1

RD0

RD1

RD2

RD3

RE0

RE1

RE2

RE3

Vcc

VDD

VSS

Vcc Vcc

Vcc

Preliminary W541E20X

Publication Release Date: June 2003

- 9 - Revision A2

PACKAGE DIAMENSIONS

18-Lead PDIP (300 mil)

1.631.47

0.0640.058

Symbol Min. Nom. Max Max.

Nom.

Min

Dimension in inch Dimension in mm

0.060 1.52

0.175 4.45

0.010

0.125

0.016

0.130

0.018

0.135

0.022

3.18

0.41

0.25

3.30

0.46

3.43

0.56

0.008

0.120

0.375

0.010

0.130

0.014

0.140

0.20

3.05

0.25

3.30

0.36

3.56

0.255

0.250

0.245 6.486.35

6.22

9.53

7.62

7.37 7.87

0.3000.290 0.310

2.29 2.54 2.790.090 0.100 0.110

0.900 0.910 22.86 23.11

015

0.055 1.40

0.355

0.335 8.51 9.02

150

Seating Plane

Base Plane

18 10

£\

Preliminary W541E20X

- 10 -

Package Dimensions, continued

20-Lead PDIP

1.631.47

0.0640.058

Symbol Min. Nom. Max. Max.

Nom.

Min.

Dimension in inch Dimension in mm

0.060 1.52

0.175 4.45

0.010

0.125

0.016

0.130

0.018

0.135

0.022

3.18

0.41

0.25

3.30

0.46

3.43

0.56

0.008

0.120

0.375

0.010

0.130

0.014

0.140

0.20

3.05

0.25

3.30

0.36

3.56

0.255

0.250

0.245 6.486.35

6.22

9.53

7.62

7.37 7.87

0.3000.290 0.310

2.29 2.54 2.790.090 0.100 0.110

1.026 1.040 20.06 26.42

015

0.075 1.91

0.355

0.335 8.51 9.02

150

Seating Plane

Base Plane

110

£\

Preliminary W541E20X

Publication Release Date: June 2003

- 11 - Revision A2

Package Dimensions, continued

28-Lead PDIP Skinny

1.631.47

0.0640.058

Symbol Min. Nom. Max. Max.

Nom.

Min.

Dimension in Inches Dimension in mm

0.060 1.52

0.175 4.45

0.010

0.125

0.016

0.130

0.018

0.135

0.022

3.18

0.41

0.25

3.30

0.46

3.43

0.56

0.008

0.120

0.370

0.010

0.130

0.014

0.140

0.20

3.05

0.25

3.30

0.36

3.56

0.293

0.288

0.283 7.447.32

7.19

9.40

7.87

7.62 8.13

0.3100.300 0.320

2.29 2.54 2.790.090 0.100 0.110

1.388 1.400 35.26 35.56

0° 15°

0.055 1.40

0.350

0.330 8.38 8.89

15°0°

28 15

1 14

ABase Plane

Mounting Plane

Preliminary W541E20X

- 12 -

Package Dimensions, continued

20-Lead SOP (300mil)

SEATING PLANE

0.25

GAUGE PLAN

20 11

7.60

0.32

0.51

0.30

7.40

0.23

0.33

0.10

0.299

0.013

0.020

0.012

0.291

0.009

0.013

0.004

Max.

Dimension in mm

2.65

Symbol Min.

2.35

Dimension in Inches

0.104

Min.

0.093 Max.

Control demensions are in milmeters.

1.27

0.10

10.65

0.40

10.00

e1.27 BSC

0.050

0.004

0.419

0.016

0.394

0.050 BSC

D12.60 13.00 0.496 0.512

Preliminary W541E20X

Publication Release Date: June 2003

- 13 - Revision A2

Package Dimensions, continued

28-Lead SOP (300 mil)

SEATING PLANE

0.25

GAUGE PLAN

28 15

7.60

0.32

0.51

0.30

7.40

0.23

0.33

0.10

0.299

0.013

0.020

0.012

0.291

0.009

0.013

0.004

Max.

Dimension in mm

2.65

Symbol Min.

2.35

Dimension in Inches

0.104

Min.

0.093 Max.

Control demensions are in milmeters .

1.27

0.10

10.65

0.40

10.00

e 1.27 BSC

0.050

0.004

0.419

0.016

0.394

0.050 BSC

D17.70 18.10 0.697 0.713

Preliminary W541E20X

- 14 -

Notes:

Headquarters

No. 4, Creation Rd. III,

Science-Based Industrial Park,

Hsinchu, Taiwan

TEL: 886-3-5770066

FAX: 886-3-5792766

http://www.winbond.com.tw/

Voice & Fax-on-demand: 886-2-27197006

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,

Taipei, Taiwan

TEL: 886-2-27190505

FAX: 886-2-27197502

Winbond Electro nics (H .K.) L td.

Rm. 803, Wor ld Trade Square, To w e r II ,

123 Hoi Bun Rd., Kwun Tong,

Kowloon, Hong Kong

TEL: 852-27513100

FAX: 852-27552064

Winbond Elec tro nics Nort h Am erica Corp.

Winbond Memo ry L ab.

Winbond Micr oe le ctro n ic s Co rp .

Winbond System s Lab.

2727 N. First Street, San Jose,

CA 95134, U.S.A.

TEL: 408-9436666

FAX: 408-5441798

Note: All data and specifications are subject to change without notice.