3069RF-ZTAT Datasheet, PDF (661/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

18.9.2 PROM Mode Operation
Table 18.12 shows the settings for the operating modes of PROM mode, and table 18.13 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/O6 pin. In status-read mode,
error information is output when an error has occurred.
Table 18.12 Settings for Each Operating Mode of PROM Mode
Pin Name
Mode
FWE
CE
OE
WE
I/O7 to 0 A18 to 0
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 the 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. 5.0, 09/04, page 639 of 978