D12320VF25V Datasheet, PDF (706/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
17.20.3 Programmer Mode Operation
Table 17.35 shows how the different operating modes are set when using programmer mode, and
table 17.36 lists the commands used in programmer mode. Details of each mode are given below.
Memory Read Mode: Memory read mode supports byte reads.
Auto-Program Mode: Auto-program mode supports programming of 128 bytes at a time. Status
polling is used to confirm the end of auto-programming.
Auto-Erase Mode: Auto-erase mode supports automatic erasing of the entire flash memory.
Status polling is used to confirm the end of auto-erasing.
Status Read Mode: Status polling is used for auto-programming and auto-erasing, and normal
termination can be confirmed by reading the I/O₆ signal. In status read mode, error information is
output if an error occurs.
Table 17.35 Settings for Each Operating Mode in Programmer Mode
Pin Names
Mode
CE
OE
WE
I/O7 to I/O0 A18 to A0
Read
L
L
H
Data output Ain
Output disable
L
Command write
L
Chip disable^*1
H
H
H
Hi-Z
×
H
L
Data input
Ain^*2
×
×
Hi-Z
×
Legend:
H: High level
L: Low level
Hi-Z: High impedance
×: Don’t care
Notes: 1. Chip disable is not a standby state; internally, it is an operation state.
2. Ain indicates that there is also address input in auto-program mode.
Rev.7.00 Feb. 14, 2007 page 672 of 1108
REJ09B0089-0700