M32C80 Datasheet, PDF (54/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
6. Processor Mode
6.2 Setting of Processor Mode
The CNVSS pin state and the PM01 and PM00 bit settings in the PM0 register determine which processor
mode is selected. Table 6.2 lists processor mode after hardware reset. Table 6.3 lists processor mode
selected by PM01 and PM00 bit settings.
Table 6.2 Processor Mode after Hardware Reset
Input Level into the CNVSS pin
VCC1(1)
Processor Mode
Microprocessor Mode
NOTE:
1. Multiplex bus cannot be assigned to all CS areas.
Table 6.3 Processor Mode Selected by the PM01 and PM00 bit Settings
PM01 and PM00 Bits
Processor Mode
002
Single-chip Mode
012
Memory Expansion Mode
102
Do not set to this value
112
Microprocessor Mode
If the PM01 and PM00 bits are rewritten, the PM01 and PM00 bits select a mode regardless of CNVSS pin
level.
Do not change the PM01 and PM00 bits to "012" (memory expansion mode) or "112" (microprocessor
mode) when the PM07 to PM02 bits in the PM0 register are being rewritten.
Figures 6.1 and 6.2 show the PM0 register and PM1 register. Figure 6.3 shows a memory map in each
processor mode.
Rev. 1.00 Nov. 01, 2005 ^{Page 35} of 330
REJ09B0271-0100