HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 359

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 I/O Ports
Section 9 I/O Ports
9.1
Overview
The chip has 15 I/O ports (ports 1 to 3, P5
to P5
, 6 to 9, and A to G), and two input-only ports
0
3
(port 4 and P5
to P5
).
4
7
Table 9.1 summarizes the port functions. The pins of each port also have other functions.
Each port includes a data direction register (DDR) that controls input/output (not provided for the
input-only ports), a data register (DR) that stores output data, and a port register (PORT) used to
read the pin states.
Ports A to E have a built-in MOS pull-up function, and in addition to DR and DDR, have a MOS
input pull-up control register (PCR) to control the on/off state of MOS input pull-up.
Port 3 and port A include an open drain control register (ODR) that controls the on/off state of the
output buffer PMOS.
Ports 1 and A to F can drive a single TTL load and 50-pF capacitive load, and ports 2, 3, 5 to 9,
and G can drive a single TTL load and 30-pF capacitive load.
Ports 1, 2, 7, and 9, and pins 5
to 5
(only when used as IRQ inputs), 6
to 6
, and A
to A
, are
0
3
4
7
4
7
Schmitt-triggered inputs.
Rev.4.00 Sep. 07, 2007 Page 329 of 1210
REJ09B0245-0400