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Rev. 5.00, 09/03, page 571 of 760
18.3.2 Port B Control Register (PBCR)
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PB7
MD1
PB7
MD0
PB6
MD1
PB6
MD0
PB5
MD1
PB5
MD0
PB4
MD1
PB4
MD0
PB3
MD1
PB3
MD0
PB2
MD1
PB2
MD0
PB1
MD1
PB1
MD0
PB0
MD1
PB0
MD0
Initial value:0000000000000000
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
The port B control register (PBCR) is a 16-bit readable/writable register that selects the pin
functions. PBCR is initialized to H'0000 by a power-on reset, but is not initialized by a manual
reset, in standby mode, or in sleep mode.
Bits 15 and 14—PB7 Mode 1 and 0 (PB7MD1, PB7MD0)
Bits 13 and 12—PB6 Mode 1 and 0 (PB6MD1, PB6MD0)
Bits 11 and 10—PB5 Mode 1 and 0 (PB5MD1, PB5MD0)
Bits 9 and 8—PB4 Mode 1 and 0 (PB4MD1, PB4MD0)
Bits 7 and 6—PB3 Mode 1 and 0 (PB3MD1, PB3MD0)
Bits 5 and 4—PB2 Mode 1 and 0 (PB2MD1, PB2MD0)
Bits 3 and 2—PB1 Mode 1 and 0 (PB1MD1, PB1MD0)
Bits 1 and 0—PB0 Mode 1 and 0 (PB0MD1, PB0MD0)
These bits select the pin functions and perform input pull-up MOS control.
Bit (2n + 1) Bit 2n
PBnMD1 PBnMD0 Pin Function
0 0 Other function (see table 18.1) (Initial value)
0 1 Port output
1 0 Port input (Pull-up MOS: on)
1 1 Port input (Pull-up MOS: off)
(n = 0 to 7)