CHAPTER 14 PORT FUNCTIONS
User’s Manual U14359EJ4V0UM
497
(b) Port CM mode control register (PMCCM)
This register can be read/written in 8-bit or 1-bit units.
Caution
If the mode of the PCM1/CLKOUT/BUSCLK pin is changed from the I/O port mode to the
CLKOUT/BUSCLK mode, a glitch may be generated in the CLKOUT/BUSCLK output
immediately after the change. Therefore, pull up the CLKOUT/BUSCLK pin when using
it. In the PLL mode (CKSEL = 0), change the mode to the CLKOUT/BUSCLK mode at a
multiple of 1 (CKDIV2 to CKDIV0 bits of CKC register = 000B).
7
6
5
4
3
2
1
0
Address
After reset
Note
PMCCM
0
0
PMCCM5 PMCCM4 PMCCM3 PMCCM2 PMCCM1 PMCCM0 FFFFF04CH
00H/3FH
Note
In ROMless modes 0 and 1, and single-chip mode 1: 3FH
In single-chip mode 0:
00H
Bit position
Bit name
Function
5
PMCCM5
Port Mode Control
Specifies operation mode of PCM5 pin.
0: I/O port mode
1: SELFREF input mode
4
PMCCM4
Port Mode Control
Specifies operation mode of PCM4 pin.
0: I/O port mode
1: REFRQ output mode
3
PMCCM3
Port Mode Control
Specifies operation mode of PCM3 pin.
0: I/O port mode
1: HLDRQ input mode
2
PMCCM2
Port Mode Control
Specifies operation mode of PCM2 pin.
0: I/O port mode
1: HLDAK output mode
1
PMCCM1
Port Mode Control
Specifies operation mode of PCM1 pin.
0: I/O port mode
1: CLKOUT output mode/BUSCLK output mode
0
PMCCM0
Port Mode Control
Specifies operation mode of PCM0 pin.
0: I/O port mode
1: WAIT input mode