Port E; Overview - Hitachi H8S/2646 Hardware Manual

9.12

Port E

9.12.1

Overview

Port E is an 8-bit I/O port. Port E has a data bus I/O function, and the pin functions change
according to the operating mode and whether 8-bit or 16-bit bus mode is selected. In the
H8S/2648, H8S/2648R, and H8S/2647, port E pins also function as LCD driver output pins (SEG8
to SEG1).
Port E has a built-in MOS input pull-up function that can be controlled by software.
Figure 9-11 shows the port E pin configuration.
Port E
Note: * In the H8S/2648, H8S/2648R, and H8S/2647.
276
Port E pins
PE7 / D7 / SEG8 *
PE6 / D6 / SEG7 *
PE5 / D5 / SEG6 *
PE4 / D4 / SEG5 *
PE3 / D3 / SEG4 *
PE2 / D2 / SEG3 *
PE1 / D1 / SEG2 *
PE0 / D0 / SEG1 *
Figure 9-11 Port E Pin Functions
Pin functions in modes 4 to 6
(I/O) / SEG8 * (output)
PE7 (I/O) / D7
(I/O) / SEG7 * (output)
PE6 (I/O) / D6
(I/O) / SEG6 * (output)
PE5 (I/O) / D5
(I/O) / SEG5 * (output)
PE4 (I/O) / D4
(I/O) / SEG4 * (output)
PE3 (I/O) / D3
(I/O) / SEG3 * (output)
PE2 (I/O) / D2
(I/O) / SEG2 * (output)
PE1 (I/O) / D1
(I/O) / SEG1 * (output)
PE0 (I/O) / D0
Pin functions in mode 7
(I/O) / SEG8 * (output)
PE7
(I/O) / SEG7 * (output)
PE6
(I/O) / SEG6 * (output)
PE5
(I/O) / SEG5 * (output)
PE4
(I/O) / SEG4 * (output)
PE3
(I/O) / SEG3 * (output)
PE2
(I/O) / SEG2 * (output)
PE1
(I/O) / SEG1 * (output)
PE0