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9.10
Port C
9.10.1
Overview
Port C is an 8-bit I/O port. Port C also functions as LCD driver output pins (H8S/2646,
H8S/2646R, H8S/2645: SEG8 to SEG1, H8S/2648, H8S/2648R, H8S/2647: SEG24 to SEG17)
and as address bus outputs. The pin functions are determined by the operating mode.
Port C has a built-in MOS input pull-up function that can be controlled by software.
Figure 9-9 shows the port C pin configuration.
Port C pins
PC7 / A7 / SEG8
PC6 / A6 / SEG7
PC5 / A5 / SEG6
PC4 / A4 / SEG5
Port C
PC3 / A3 / SEG4
PC2 / A2 / SEG3
PC1 / A1 / SEG2
PC0 / A0 / SEG1
Pin functions in mode 6
PC7
(I/O) /
A7
PC6
(I/O) /
A6
PC5
(I/O) /
A5
PC4
(I/O) /
A4
PC3
(I/O) /
A3
PC2
(I/O) /
A2
PC1
(I/O) /
A1
PC0
(I/O) /
A0
Notes: *1 In the H8S/2646, H8S/2646R, and H8S/2645.
*2 In the H8S/2648, H8S/2648R, and H8S/2647.
266
*1
*2
/ SEG24
*1
*2
/ SEG23
*1
*2
/ SEG22
*1
*2
/ SEG21
*1
*2
/ SEG20
*1
*2
/ SEG19
*1
*2
/ SEG18
*1
*2
/ SEG17
*1
(output) / SEG8
(output) / SEG24
*1
(output) / SEG7
(output) / SEG23
*1
(output) / SEG6
(output) / SEG22
*1
(output) / SEG5
(output) / SEG21
*1
(output) / SEG4
(output) / SEG20
*1
(output) / SEG3
(output) / SEG19
*1
(output) / SEG2
(output) / SEG18
*1
(output) / SEG1
(output) / SEG17
Figure 9-9 Port C Pin Functions
Pin functions in modes 4 and 5
A7
(output)
A6
(output)
A5
(output)
A4
(output)
A3
(output)
A2
(output)
A1
(output)
A0
(output)
Pin functions in mode 7
*2
(output)
PC7
(I/O) / SEG8
*2
(output)
PC6
(I/O) / SEG7
*2
(output)
PC5
(I/O) / SEG6
*2
(output)
PC4
(I/O) / SEG5
*2
(output)
PC3
(I/O) / SEG4
*2
(output)
PC2
(I/O) / SEG3
*2
(output)
PC1
(I/O) / SEG2
*2
(output)
PC0
(I/O) / SEG1
*1
*2
(output) / SEG24
(output)
*1
*2
(output) / SEG23
(output)
*1
*2
(output) / SEG22
(output)
*1
*2
(output) / SEG21
(output)
*1
*2
(output) / SEG20
(output)
*1
*2
(output) / SEG19
(output)
*1
*2
(output) / SEG18
(output)
*1
*2
(output) / SEG17
(output)
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