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19.1.4 Read/write (software command control) mode
When connecting shown in Figure 19.1.3 and V
operates at the read/write mode. In the read/write mode, the built–in flash memory becomes read, output
disable, standby or program state depending on the control signals. In this mode, program, read, and erase
operations can be performed to the built–in flash memory. Table 19.1.4 lists the states of the built–in flash
memory.
Table 19.1.4 States of control signals and built–in flash memory in read/write mode
Pin
State
Read
Output disable
Standby
Program
Notes 1:
can be V
2: Refer to "(5) Software command" for read and write states.
(1) Read
When executing the read command or program verify command etc., the read mode is used. (Refer
to "(5) Software command.")
(2) Output disable
The microcomputer enters the read disable state.
(3) Standby
The microcomputer enters the power–saving state and the supply current decreases.
(4) Program
When inputting the command code or program data etc., the program mode is used. (Refer to "(5)
Software command.")
___
CE
V
IL
V
IL
V
IH
V
IL
or V
.
IL
IH
7751 Group User's Manual
FLASH MEMORY VERSION
H level is applied to the V
PP
___
___
WE
OE
V
V
IH
IL
V
V
IH
IH
V
V
IL
IH
19.1 Parallel input/output mode
pin, the built–in flash memory
PP
V
PP
V
H
PP
V
H
PP
V
H
PP
V
H
PP
Data I/O
Output
Floating
Floating
Input
19–9
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