R8C13 datasheet(56/224 Pages) RENESAS

56 / 224 page

Rev.1.20

Jan 27, 2006

page 45 of 205

REJ09B0111-0120

R8C/13 Group

8. Processor Mode

8.1 Types of Processor Mode

The processor mode is single-chip mode. Table 8.1 shows the features of the processor mode. Figure

8.1 shows the PM0 and PM1 register.

Processor mode register 0(1)

Symbol

Address

After reset

PM0

000416

0016

Bit name

Function

Bit symbol

PM03

(b2-b0)

Reserved bit

Software reset bit

Setting this bit to “1” resets the

microcomputer. When read, its

content is “0”.

Set to “0”

NOTES:

1. Set the PRC1 bit in the PRCR register to "1" (write enable) before writing to this register.

Nothing is assigned. When write, set to “0”. When read, its

content is "0".

(b7-b4)

Figure 8.1 PM0 Register and PM1 Register

Table 8.1 Features of Processor Mode

Processor mode register 1

SymbolAddressAfter reset

PM1000516

0016

Bit nameFunction

Bit symbol

b7b6b5

b4b3b2

b1b0

NOTES:

1. Set the PRC1 bit in the PRCR register to "1" (write enable) before writing to this register.

2. PM12 bit is set to “1” by writing a “1” in a program. (Writing a “0” has no effect.)

0 : Watchdog timer interrupt

1 : Watchdog timer reset(2)

WDT interrupt/reset

switch bit(2)

PM12

(b1)

0 : Disabled

1 : Enabled

PM10

Data area access enable

bit

Nothing is assigned. When write, set to “0”. When read, its

content is 0.

(b6-b3)

Set to “0”

Reserved bit

Set to “0”

(b7)

Reserved bit

(1)

Processor mode

Access space

Pins which are assigned I/O ports

Single-chip mode

SFR, internal RAM, internal ROM

All pins are I/O ports or peripheral

function I/O pins

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