M16C30P_07 Datasheet, PDF (46/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
6. Processor Mode
Processor Mode Register 0 ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
Address
PM0
0004h
After Reset ⁽³⁾
00000000b (CNVSS pin = L)
00000011b (CNVSS pin = H)
Bit Symbol
Bit Name
Function
RW
Processor Mode Bit ⁽²⁾
PM00
PM01
PM02
PM03
R/W Mode Select Bit ⁽³⁾
Softw are Reset Bit
b1 b0
0 0 : Single-chip mode
RW
0 1 : Memory expansion mode
1 0 : Do not set
RW
1 1 : Microprocessor mode
___ _____ ____
0 : RD, BHE, WR
___ ______ _____
RW
1 : RD, WRH, WRL
Setting this bit to “1” resets the microcomputer.
When read, its content is “0”.
RW
—
Reserved Bit
Set to “0”.
(b4)
RW
—
Reserved Bit
Set to “0”.
(b5)
RW
Port P4_0 to P4_3 Function 0 : Address output
PM06 _{Select Bit (3)}
1 : Port function (Address is not output)
RW
PM07
BCLK Output Disable Bit ⁽³⁾
0 : BCLK is output
1 : BCLK is not output (Pin is left high-impedance) ^RW
NOTES :
1. Write to this register after setting the PRC1 bit in the PRCR register to “1” (w rite enable).
2 The PM01 to PM00 bits do not change at softw are reset.
3 Effective w hen the PM01 to PM00 bits are set to “01b” (memory expansion mode) or “11b” (microprocessor mode).
Figure 6.1 PM0 Register
Rev.1.22 Mar 29, 2007 Page 30 of 291
REJ09B0179-0122