HD6473032F16 Datasheet, PDF (275/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 9 I/O Ports
Section 9 I/O Ports
9.1 Overview
The H8/3052BF has 10 input/output ports (ports 1, 2, 3, 4, 5, 6, 8, 9, A, and B) and one input port
(port 7). Table 9.1 summarizes the port functions. The pins in each port are multiplexed as shown
in table 9.1.
Each port has a data direction register (DDR) for selecting input or output, and a data register
(DR) for storing output data. In addition to these registers, ports 2, 4, and 5 have an input pull-up
MOS control register (PCR) for switching input pull-up MOS transistors on and off.
Ports 1 to 6 and port 8 can drive one TTL load and a 90-pF capacitive load. Ports 9, A, and B can
drive one TTL load and a 30-pF capacitive load. Ports 1 to 6 and 8 to B can drive a darlington
pair. Ports 1, 2, 5, and B can drive LEDs (with 10-mA current sink). Pins P8₂ to P8₀, PA₇ to PA₀,
and PB₃ to PB₀ have Schmitt-trigger input circuits.
For block diagrams of the ports see appendix C, I/O Port Block Diagrams.
Rev. 3.00 Mar 21, 2006 page 245 of 814
REJ09B0302-0300