R01UH0823EJ0100 Rev.1.00
Page 461 of 1823
Jul 31, 2019
RX23W Group
22. Multi-Function Pin Controller (MPC)
22.2.5
P3n Pin Function Control Registers (P3nPFS) (n = 0, 1)
—: Do not specify this value.
Address(es): P30PFS 0008 C158h, P31PFS 0008 C159h
b7
b6
b5
b4
b3
b2
b1
b0
—
ISEL
—
PSEL[4:0]
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b4 to b0
Pin Function Select
These bits select the peripheral function. For individual pin functions,
see the tables below.
R/W
b5
—
Reserved
This bit is read as 0. The write value should be 0.
R/W
b6
Interrupt Input Function Select
0: Not used as IRQn input pin
1: Used as IRQn input pin
P30: IRQ0 input switch (85/56 pins)
P31: IRQ1 input switch (85/56 pins)
R/W
b7
—
Reserved
This bit is read as 0. The write value should be 0.
R/W
Table 22.6
Register Settings for Input/Output Pin Function in 85-Pin and 56-Pin
PSEL[4:0]
Settings
Pin
P30
P31
00000b
(initial value)
Hi-Z
00001b
MTIOC4B
MTIOC4D
00101b
TMRI3
TMCI2
00111b
POE8#
—
01010b
RXD1
SMISO1
SSCL1
—
01011b
—
CTS1#
RTS1#
SS1#
10000b
CMPOB3
—
10111b
AUDIO_MCLK
SSISCK0