17.28.2 Prom Mode Operation - Renesas H8S/2319 series Hardware Manual

17.28.2 PROM Mode Operation

Table 17-57 shows the settings for the operating modes of PROM mode, and table 17-58 lists the
commands used in PROM mode. The following sections provide detailed information on each
mode.
• Memory-read mode: This mode supports reading, in units of bytes, from the user MAT or user
boot MAT.
• Auto-program mode: This 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: This mode only supports the automatic erasing of the entire user MAT or
user boot MAT. Status polling is used to confirm the end of automatic erasing.
• 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/O
error information is output when an error has occurred.
Table 17-57 Settings for Each Operating Mode of PROM Mode
Mode
Read
Output disable
Command write
1
Chip disable *
Notes: 1. The chip-disable mode is not a standby state; internally, it is an operational state.
2. Ain indicates that there is also an address input in auto-program mode.
Rev. 5.00, 12/03, page 726 of 1088
CE CE OE OE
CE CE OE OE
L L
L H
L H
H X
pin. In status-read mode,
6
Pin Name
WE WE
WE WE
I/O7 to 0
H Data output
H Hi-Z
L Data input
X Hi-Z
A18 to 0
Ain
X
2
Ain *
X