8.3
Port Function Controller
The port function controller controls the I/O ports.
The port function controller incorporates the following registers.
• Port function control register 9 (PFCR9)*
• Port function control register A (PFCRA)
• Port function control register B (PFCRB)
Note: * PFCR9 is supported only by the H8SX/1527.
8.3.1
Port Function Control Register 9 (PFCR9)
PFCR9 selects the multiple functions for the TPU (unit 0) I/O pins.
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
7, 6
5
TPUMS3A 0
4
TPUMS3B 0
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7
6
5
-
-
TPUMS3A
0
0
0
R/W
R/W
R/W
Initial
Value
R/W
All 0
R/W
R/W
R/W
4
3
TPUMS3B
TPUMS2
0
0
R/W
R/W
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
TPU I/O Pin Multiplex Function Select
Selects TIOCA3 function
0: Specifies P21 as output compare output and input
capture
1: Specifies P20 as input capture input and P21 as output
compare
TPU I/O Pin Multiplex Function Select
Selects TIOCC3 function
0: Specifies P22 as output compare output and input
capture
1: Specifies P23 as input capture input and P22 as output
compare
Rev. 3.00 Mar. 14, 2006 Page 243 of 804
Section 8 I/O Ports
2
1
TPUMS1
TPUMS0A
TPUMS0B
0
0
R/W
R/W
REJ09B0104-0300
0
0
R/W