Flash Memory Prom Mode; 17.11.1 Prom Mode Setting - Hitachi H8S/2338 Series Hardware Manual

17.11

Flash Memory PROM Mode

17.11.1 PROM Mode Setting

Programs and data can be written and erased in PROM mode as well as in the on-board
programming modes. In PROM mode, the on-chip ROM can be freely programmed using a
PROM programmer that supports the Hitachi microcomputer device type with 256-kbyte on-chip
flash memory (FZTAT256V3A). 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 17-12 shows PROM mode pin settings.
Table 17-12 PROM Mode Pin Settings
Pin Names
Mode pins: MD , MD
2
Mode setting pins: P66, P65, P64
FWE pin
STBY pin
RES pin
XTAL, EXTAL pins
Other pins requiring setting: P32, P25
, MD
1 0
Settings/External Circuit Connection
Low-level input
High-level input to P66, low-level input to P65 and P64
High-level input (in auto-program and auto-erase
modes)
High-level input (do not select hardware standby mode)
Reset circuit
Oscillator circuit
High-level input to P32, low-level input to P25
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