SH7125_08 Datasheet, PDF (603/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 17 Flash Memory
17.3 Input/Output Pins
Flash memory is controlled by the pins as shown in table 17.3.
Table 17.3 Pin Configuration
Pin Name
Power-on reset
Flash programming
enable
Mode 1
Transmit data
Symbol
RES
FWE
MD1
TXD1 (PA4)
I/O
Input
Input
Input
Output
Receive data
RXD1 (PA3) Input
Function
Reset
Hardware protection when
programming flash memory
Sets operating mode of this LSI
Serial transmit data output (used in
boot mode)
Serial receive data input (used in boot
mode)
17.4 Register Descriptions
17.4.1 Registers
The registers/parameters, which control flash memory when the on-chip flash memory is valid are
shown in table 17.4.
There are several operating modes for accessing flash memory, for example, read mode/program
mode. The correspondence of operating modes and registers/parameters for use is shown in table
17.5.
Rev. 4.00 Jul. 25, 2008 Page 583 of 750
REJ09B0243-0400