266
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.
PC7 / A7 / SEG8
*
1
/ SEG24
*
2
PC6 / A6 / SEG7
*
1
/ SEG23
*
2
PC5 / A5 / SEG6
*
1
/ SEG22
*
2
PC4 / A4 / SEG5
*
1
/ SEG21
*
2
PC3 / A3 / SEG4
*
1
/ SEG20
*
2
PC2 / A2 / SEG3
*
1
/ SEG19
*
2
PC1 / A1 / SEG2
*
1
/ SEG18
*
2
PC0 / A0 / SEG1
*
1
/ SEG17
*
2
Port C
Port C pins
Pin functions in mode 7
A7
A6
A5
A4
A3
A2
A1
A0
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
A7
A6
A5
A4
A3
A2
A1
A0
(output) / SEG8
*
1
(output) / SEG24
*
2
(output)
(output) / SEG7
*
1
(output) / SEG23
*
2
(output)
(output) / SEG6
*
1
(output) / SEG22
*
2
(output)
(output) / SEG5
*
1
(output) / SEG21
*
2
(output)
(output) / SEG4
*
1
(output) / SEG20
*
2
(output)
(output) / SEG3
*
1
(output) / SEG19
*
2
(output)
(output) / SEG2
*
1
(output) / SEG18
*
2
(output)
(output) / SEG1
*
1
(output) / SEG17
*
2
(output)
Pin functions in modes 4 and 5
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
(I/O) / SEG8
*
1
(output) / SEG24
*
2
(output)
(I/O) / SEG7
*
1
(output) / SEG23
*
2
(output)
(I/O) / SEG6
*
1
(output) / SEG22
*
2
(output)
(I/O) / SEG5
*
1
(output) / SEG21
*
2
(output)
(I/O) / SEG4
*
1
(output) / SEG20
*
2
(output)
(I/O) / SEG3
*
1
(output) / SEG19
*
2
(output)
(I/O) / SEG2
*
1
(output) / SEG18
*
2
(output)
(I/O) / SEG1
*
1
(output) / SEG17
*
2
(output)
Pin functions in mode 6
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
Notes:
*
1 In the H8S/2646, H8S/2646R, and H8S/2645.
*
2 In the H8S/2648, H8S/2648R, and H8S/2647.
Figure 9-9 Port C Pin Functions
Summary of Contents for H8S/2645
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