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17.13
Flash Memory Writer Mode
17.13.1
Writer Mode Setting
Programs and data can be written and erased in writer mode as well as in the on-board
programming modes. In writer mode, the on-chip ROM can be freely programmed using a PROM
programmer that supports Hitachi microcomputer device types with 128-kbyte on-chip flash
memory. In writer mode, the on-chip ROM can be freely programmed using a PROM programmer
that supports the Hitachi microcomputer device type with 128-kbyte on-chip flash memory. Flash
memory read mode, auto-program mode, auto-erase mode, and status read mode are supported
with this device type. In auto-program mode, auto-erase mode, and status read mode, a status
polling procedure is used, and in status read mode, detailed internal signals are output after
execution of an auto-program or auto-erase operation.
Table 17.18 shows writer mode pin settings.
Table 17.18 Writer Mode Pin Settings
Pin Names
Settings/External Circuit Connection
Mode pins: MD
2
, MD
1
, MD
0
Mode setting pins: PF
2
, PF
1
, PF
0
FWE pin
Low-level input
High-level input to PF
2
, low-level input to PF
1
and PF
0
High-level input (in auto-program and auto-erase
modes)
STBY
pin
RES
pin
High-level input (do not select hardware standby mode)
Power-on reset circuit
NMI pin
High-level input (for power-on reset)
XTAL, EXTAL pins
Oscillator circuit
Other pins requiring setting: P2
3
, P2
5
High-level input to P2
3
and P2
5