Renesas 7700 FAMILY User Manual page 433

FLASH MEMORY VERSION
19.1 Parallel input/output mode
Reset command
This command is used to stop executing of program or erase safely after inputting the program or
erase command code that is, after the command code is latched into the internal command latch
in the first cycle.
Figure 19.1.8 shows the reset command execution timing.
When inputting the control signals and the command code "FF
or erase command code is latched into the command latch, the command code is latched into the
internal command latch at the rising edge of the WE signal.
When inputting the control signals and command code "FF
command latch is cleared to "00
latched. Then, program or erase is not executed. (The contents of the built–in flash memory is not
changed.)
A –A
0 16
CE
OE
WE
Floating
D –D
0 7
V H
PP
V
PP
V L
PP
Fig. 19.1.8 Reset command execution timing
19–16
" and becomes the state where the read command code is
16
t
CS
t
WPH
Floating
40
16
or
20
16
First cycle
Program or erase
7751 Group User's Manual
" in the first cycle after the program
16
___
" again in the second cycle, the
16
t
WC
t
CH
t
CS
t
WPH
t
WP
t
DS
Floating
FF
16
t
DH
First cycle Second cycle
Reset
t
WC
t
CH
t
WP
t
DS
Floating
FF
16
t
DH