M16CSLASH62 datasheet(568/621 Pages) RENESAS

568 / 621 page

External ROM

Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

553

6.4 Processor Mode

The external ROM version is operated only in microprocessor mode, so be sure to perform the following:

• Connect CNVSS pin to VCC.

• Fix the processor mode bit to “112”

Figure 6.4.1 shows the processor mode register 0.

Figure 6.4.1. Processor mode register 0

Processor mode register 0 (Note)

Symbol

Address

When rese

PM0

000416

0316

Bit name

Function

Bit symbol

0 0: Inhibited

0 1: Inhibited

1 0: Inhibited

1 1: Microprocessor mode

b1 b0

PM03

PM01

PM00

Processor mode bit

PM02

R/W mode select bit

0 : RD,BHE,WR

1 : RD,WRH,WRL

Software reset bit

The device is reset when this bit is set

to “1”. The value of this bit is “0” when

read.

PM04

0 0 : Multiplexed bus is not used

0 1 : Allocated to CS2 space

1 0 : Allocated to CS1 space

1 1 : Inhibited

b5 b4

Multiplexed bus space

select bit

PM05

PM06

PM07

Port P40 to P43 function

select bit

0 : Address output

1 : Port function

(Address is not output)

BCLK output disable bit

0 : BCLK is output

1 : BCLK is not output

(Pin is left floating)

Note: Set bit 1 of the protect register (address 000A16) to “1” when writing new

values to this register.

M16C/62 Datasheet(PDF) 568 Page - Renesas Technology Corp

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