HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 808

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 19 ROM
19.11.3 PROM Mode Operation
Table 19.14 shows how the different operating modes are set when using PROM mode, and table
19.15 lists the commands used in PROM 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/O
output if an error occurs.
Table 19.14 Settings for Each Operating Mode in PROM Mode
Mode
Read
Output disable
Command write
Chip disable *
Legend:
H:
L:
Hi-Z: High impedance
X:
Notes: 1. Chip disable is not a standby state; internally, it is an operation state.
Rev.6.00 Sep. 27, 2007 Page 778 of 1268
REJ09B0220-0600
High level
Low level
Don’t care
2. Ain indicates that there is also address input in auto-program mode.
1
CE
L
L
L
H
OE
L
H
H
X
6
signal. In status read mode, error information is
WE
H
H
L
X
Pin Names
I/O
Data output
Hi-Z
Data input
Hi-Z
7
to I/O
0
A
Ain
X
Ain *
X
18
to A
2
0