HD64F3039F18 Datasheet, PDF (188/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
Port 7 Data Register (P7DR)
Bit
7
6
5
4
3
2
1
0
P7₇
P7₆
P7₅
P7₄
P7₃
P7₂
P7₁
P7₀
Initial value
—*
—*
—*
—*
—*
—*
—*
—*
Read/Write
R
R
R
R
R
R
R
R
Note: * Determined by pins P₇ to P₀.
When P7DR is read, the pin levels are always read.
7.8 Port 8
7.8.1 Overview
Port 8 is a 2-bit input/output port that is also used for IRQ₁ and IRQ₀ input. Figure 7.20 shows the
pin configuration of port 8.
Pin P8₀ functions as input/output pin or as an IRQ₀ input pin. Pins P8₁ function as either input pins
or IRQ₁ input pins in modes 1, 3, and 5, and as input/output pins or IRQ₁ input pins in modes 6 and
7.
Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a
Darlington transistor pair. Pins P8₁ and P8₀ have Schmitt-trigger inputs.
Port 8
Port 8 pins Modes 1, 3, and 5
Modes 6 and 7
P8₁/IRQ₁
P8₀/IRQ₀
P8₁ (input)/IRQ₁ (input)
P8₁ (input/output)/IRQ₁ (input)
P8₀ (input/output)/IRQ₀ (input) P8₀ (input/output)/IRQ₀ (input)
Figure 7.20 Port 8 Pin Configuration
Rev.3.00 Mar. 26, 2007 Page 164 of 682
REJ09B0353-0300