Port 9; Overview; Figure 7.9 Port 9 Pin Configuration - Hitachi H8/3062 Hardware Manual

7.10

Port 9

7.10.1

Overview

Port 9 is a 6-bit input/output port that is also used for input and output (TxD
) by serial communication interface channels 0 and 1 (SCI0 and SCI1), and for IRQ
SCK , SCK
0 1
and IRQ
input. See table 7.17 for the selection of pin functions.
4
The IRQ and IRQ
functions are selected by IER settings, regardless of whether the pin is used
5 4
for input or output. Caution is therefore required. For details see section 5.3.1, External Interrupts.
Port 9 has the same set of pin functions in all operating modes. Figure 7.9 shows the pin
configuration of port 9.
Pins in port 9 can drive one TTL load and a 30-pF capacitive load. They can also drive a
darlington transistor pair.
Port 9
Port 9 pins
P9 (input/output)/SCK
5
P9 (input/output)/SCK
4
P9 (input/output)/RxD (input)
3
P9 (input/output)/RxD (input)
2
P9 (input/output)/TxD (output)
1
P9 (input/output)/TxD (output)
0

Figure 7.9 Port 9 Pin Configuration

, TxD
0
(input/output)/IRQ (input)
1 5
(input/output)/IRQ (input)
0 4
1
0
1
0
, RxD , RxD ,
1 0 1
5
195