D12320VF25IV Datasheet, PDF (860/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 ROM
19.20 Flash Memory PROM Mode
19.20.1 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 Renesas 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 19.34 shows PROM mode pin settings.
Table 19.34 PROM Mode Pin Settings
Pin Names
Mode pins: MD2, MD1, MD0
Mode setting pins: P66, P65, P64
FWE pin
STBY pin
RES pin
XTAL, EXTAL pins
Other pins requiring setting: P32, P25
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
Rev.6.00 Sep. 27, 2007 Page 828 of 1268
REJ09B0220-0600