17
P/N:PM1097 REV. 1.3, NOV. 07, 2006
MX23J12840
[Usage Cautions]
(1) Rated operation
Operation using timing other than shown in the timing charts is no t guaranteed.
(2) Commands that can be input
The o nly co mmands that can be input are 00H, 01H, 50H, and FFH. Do no t input any o ther co mmands .
If o ther commands are input, the subsequent operatio n is not guaranteed.
(3) Command limitations during Busy period
Do not input commands other than the reset command (FFH) dur ing the Busy period. If a command is input
during the Busy period, the subsequent operation is not guaranteed.
(4) Cautions regarding RE clock
•Following the last RE clock, do not input the RE clock until the RB pin changes from Busy to Ready.
•Do not input the RE clock other than during data output.
(5) Cautions upon power application
Since the state o f the device is undetermined upon power o n, input high level to the CE pin and execute the reset
command following power on.
(6) Cautions during read mode
•P erf orm address input immediately following command input. If address input is done witho ut perf orming co m-
mand input first, the correct data cannot be output because the o peration mode is undetermined.
•To ex ecute the read mo de after the read mode has been sto pped with the reset co mmand (FFH) and CE, input
again a command and address.
(7) Busy output following access of last address in page in read mode
After the access to the last address in a page, if the delay (tRHCH) from RE to CE is 30 ns or less, the Ready
status is maintained and Busy is not output by k eeping CE high level for a set period (tCEH).
tCEH
tRHCH
527526
CE
RE
RB