SH7108 Datasheet, PDF (451/560 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 14 Pin Function Controller (PFC)
14.1.4 Port B Control Registers 1 and 2 (PBCR1 and PBCR2)
PBCR1 and PBCR2 are 16-bit readable/writable registers that select the multiplexed pin function
of the pins on port B.
Note that bit 9 in PBCR1 and bits 3 to 0 in PBCR2 are disabled in the SH7108.
(1) Port B Control Registers 1 and 2 (PBCR1 and PBCR2) in SH7108
Register
PBCR1
PBCR1
PBCR1
PBCR2
PBCR2
PBCR1
PBCR2
PBCR2
Bit
15, 14
8 to 0
9
15 to 12
3 to 0
13
11
10
Bit Name
—
—
—
—
—
PB5MD2
PB5MD1
PB5MD0
Initial
Value R/W
All 0 R
All 0 R
0
R
All 0 R
All 0 R
0
R/W
0
R/W
0
R/W
PBCR1 12
PB4MD2 0
R/W
PBCR2 9
PB4MD1 0
R/W
PBCR2 8
PB4MD0 0
R/W
PBCR1 11
PB3MD2 0
R/W
PBCR2 7
PB3MD1 0
R/W
PBCR2 6
PB3MD0 0
R/W
PBCR1 10
PB2MD2 0
R/W
PBCR2 5
PB2MD1 0
R/W
PBCR2 4
PB2MD0 0
R/W
Legend: x: Don’t care.
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
PB5 Mode
Select the function of the PB5/IRQ3/POE3 pin.
000: PB5 I/O (port)
011: Setting prohibited
001: IRQ3 input (INTC) 1xx: Setting prohibited
010: POE3 input (port)
PB4 Mode
Select the function of the PB4/IRQ2/POE2 pin.
000: PB4 I/O (port)
011: Setting prohibited
001: IRQ2 input (INTC) 1xx: Setting prohibited
010: POE2 input (port)
PB3 Mode
Select the function of the PB3/IRQ1/POE1 pin.
000: PB3 I/O (port)
011: Setting prohibited
001: IRQ1 input (INTC) 1xx: Setting prohibited
010: POE1 input (port)
PB2 Mode
Select the function of the PB2/IRQ0/POE0 pin.
000: PB2 I/O (port)
011: Setting prohibited
001: IRQ0 input (INTC) 1xx: Setting prohibited
010: POE0 input (port)
Rev.1.00 Sep. 18, 2008 Page 417 of 522
REJ09B0069-0100