SH7055S Datasheet, PDF (839/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

22.9.2 Programmer Mode Operation
Table 22.14 shows the settings for the operating modes of programmer mode, and table 22.15 lists
the commands used in programmer mode. The following sections provide detailed information on
each mode.
• Memory-read mode
Supports reading from the user MAT or user boot MAT in bytes.
• Auto-program mode
Supports the simultaneous programming of the user MAT and user boot MAT in 128-byte
units. Status polling is used to confirm the end of automatic programming.
• Auto-erase mode
Supports only automatic erasure of the entire user MAT or user boot MAT. Status polling is
used to confirm the end of automatic erasure.
• Status-read mode
Status polling is used with automatic programming and automatic erasure. Normal completion
can be detected by reading the signal on the I/O6 pin. In status-read mode, error information is
output when an error has occurred.
Table 22.14 Settings for Each Operating Mode of Programmer Mode
Pin Name
Mode
FWE
CE
OE
WE
I/O7 to I/O0
A19 to A0
Read
H or L
L
L
H
Data output
Ain
Output disable H or L
L
H
H
Hi-Z
X
Command write H or L
L
H
L
Data input
Ain*
Chip disable
H or L
H
X
X
Hi-Z
X
Notes: 1. The chip-disable mode is not a standby state; internally, it is an operational state.
2. To write commands when making a transition to auto-program or auto-erase mode,
input a high-level signal on the FWE pin.
* Ain indicates that there is also an address input in auto-program mode.
Rev.2.0, 07/03, page 801 of 960