M32CSLASH8B datasheet(380/406 Pages) RENESAS

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Under development

M32C/8B Group

25. Usage Notes

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 363 of 385

25.3

Processor Mode

• When a port shares its pin with a bus control pin, such as address bus, data bus, CS, or RD, set its

corresponding Port Pi Register (i = 0 to 15) and Port Pi Direction Register after entering single-chip mode.

(Technical update: TN-M16C-49-0004)

• Rewriting bits PM01 and PM00 in the PM0 register places the MCU in the corresponding processor mode

regardless of CNVSS input level. When setting bits PM01 and PM00 to 01b (memory expansion mode) or 11b

(microprocessor mode), do not set simultaneously with bits PM07 to PM02. First, set bits PM02, PM05 and

PM04, and PM07 in the PM0 register, and also set bits PM11 and PM10, PM15 and PM14 in the PM1 register.

Then, set bits PM01 and PM00.

• When the MCU starts up in microprocessor mode, the internal ROM cannot be accessed.

M32C/8B bảng dữ liệu(PDF) 380 Page - Renesas Technology Corp