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HD6473032F16 Datasheet, PDF (279/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
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9.2 Port 1
Section 9 I/O Ports
9.2.1 Overview
Port 1 is an 8-bit input/output port with the pin configuration shown in figure 9.1. The pin
functions differ between the expanded modes with on-chip ROM disabled, expanded modes with
on-chip ROM enabled, and single-chip mode. In modes 1 to 4 (expanded modes with on-chip
ROM disabled), they are address bus output pins (A7 to A0).
In modes 5 and 6 (expanded modes with on-chip ROM enabled), settings in the port 1 data
direction register (P1DDR) can designate pins for address bus output (A7 to A0) or generic input.
In mode 7 (single-chip mode), port 1 is a generic input/output port.
When DRAM is connected to area 3, A7 to A0 output row and column addresses in read and write
cycles. For details see section 7, Refresh Controller.
Pins in port 1 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Port 1
Port 1 pins Modes 1 to 4 Modes 5 and 6
Mode 7
P17 /A7
P16 /A6
P15 /A5
P14 /A4
P13 /A3
P12 /A2
P11 /A1
P10 /A0
A 7 (output)
A 6 (output)
A 5 (output)
A 4 (output)
A 3 (output)
A 2 (output)
A 1 (output)
A 0 (output)
P17 (input)/A 7 (output)
P16 (input)/A 6 (output)
P15 (input)/A 5 (output)
P14 (input)/A 4 (output)
P13 (input)/A 3 (output)
P12 (input)/A 2 (output)
P11 (input)/A 1 (output)
P10 (input)/A 0 (output)
P17 (input/output)
P16 (input/output)
P15 (input/output)
P14 (input/output)
P13 (input/output)
P12 (input/output)
P11 (input/output)
P10 (input/output)
Figure 9.1 Port 1 Pin Configuration
Rev. 3.00 Mar 21, 2006 page 249 of 814
REJ09B0302-0300
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