Port D; Overview - Hitachi H8S/2646 Hardware Manual

9.11

Port D

9.11.1

Overview

Port D is an 8-bit I/O port. Port D has a data bus I/O function, and the pin functions change
according to the operating mode. In the H8S/2648, H8S/2648R, H8S/2647, port D pins also
function as LCD driver output pins (SEG16 to SEG9).
Port D has a built-in MOS input pull-up function that can be controlled by software.
Figure 9-10 shows the port D pin configuration.
Port D
Note: * In the H8S/2648, H8S/2648R, and H8S/2647.
Port D pins
PD7 / D15 / SEG16 *
PD6 / D14 / SEG15 *
PD5 / D13 / SEG14 *
PD4 / D12 / SEG13 *
PD3 / D11 / SEG12 *
PD2 / D10 / SEG11 *
PD1 / D9 / SEG10 *
PD0 / D8 / SEG9 *
Figure 9-10 Port D Pin Functions
Pin functions in modes 4 to 6
(I/O) / SEG16 * (output)
D15
(I/O) / SEG15 * (output)
D14
(I/O) / SEG14 * (output)
D13
(I/O) / SEG13 * (output)
D12
(I/O) / SEG12 * (output)
D11
(I/O) / SEG11 * (output)
D10
(I/O) / SEG10 * (output)
D9
(I/O) / SEG9 * (output)
D8
Pin functions in mode 7
(I/O) / SEG16 * (output)
PD7
(I/O) / SEG15 * (output)
PD6
(I/O) / SEG14 * (output)
PD5
(I/O) / SEG13 * (output)
PD4
(I/O) / SEG12 * (output)
PD3
(I/O) / SEG11 * (output)
PD2
(I/O) / SEG10 * (output)
PD1
(I/O) / SEG9 * (output)
PD0
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