Chapter 8. Processor Mode; Types Of Processor Mode - Renesas M16C FAMILY Hardware Manual

Under development
Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/11 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.
Table 8.1 Features of Processor Mode
Processor mode
Single-chip mode
Processor mode register 0
b7 b6 b5 b4 b3
Notes:
1. Set the PRC1 bit in the PRCR register to "1" (write enable) before writing to this register.
Processor mode register 1
b7 b6 b5 b4 b3
0
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.)
Figure 8.1 PM0 Register and PM1 Register
Rev.0.91 2003 Sep 08
Access space
SFR, internal RAM, internal ROM
1
Symbol
b2 b1 b0
PM0
0 0
0
Bit symbol
Reserved bit
(b2-b0)
PM03 Software reset bit
Nothing is assigned. When write, set to "0". When read, its
(b7-b4)
content is "0".
1
b2 b1 b0 Symbol
PM1
0
0
Bit symbol
(b1-b0)
WDT inerrupt/reset switch
PM12
bit
Nothing is assigned. When write, set to "0". When read, its
(b6-b3)
content is "0".
(b7)
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All pins are I/O ports or peripheral
function I/O pins
Address
0004
16
Bit name
Must set to "0"
Setting this bit to "1" resets the
microcomputer. When read, its
content is "0".
Address After reset
0005 00
16
Bit name
Must set to "0"
Reserved bit
0 : Watchdog timer interrupt
1 : Watchdog timer reset
Reserved bit Must set to "0"
8. Processor Mode
Pins which are assigned I/O ports
After reset
00
16
Function
16
Function
2
RW
RW
RW
RW
RW
RW
RW