Renesas 7700 FAMILY User Manual page 419

FLASH MEMORY VERSION
In the flash memory version M37751F6CFP, to perform program, read, and erase operations for the built-
in flash memory is possible. The M37751F6CFP has the same function as the mask ROM version except
for the built–in flash memory (Note).
The M37751F6CFP can select the microcomputer mode, which is performed the same operation as the
mask ROM version, or the flash memory mode, which enables to access to the built–in flash memory. When
inputting "L" level to the RESET pin, the M37751F6CFP enters the flash memory mode. In the flash memory
mode, there are two modes: the parallel input/output mode and the serial input/output mode.
Note: Ports P4 and P4
5
Microcomputer mode
Flash memory mode
Fig. 19.1.1 Operation mode for flash memory version
P4 , P4
5 6
Fig. 19.1.2 Ports P4
5
19–2
______
peripheral circuits are different from those of mask ROM version.
6
Parallel input/output mode
Serial input/output mode
Data bus
and P4 peripheral circuit (flash memory version)
6
7751 Group User's Manual
Direction register
Port latch
Read–only mode
Read/write mode