Port 9; Overview - Renesas F-ZTAT H8 Series Hardware Manual

9.10

Port 9

9.10.1

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 9.17 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. For details see section 5, Interrupt Controller.
Port 9 has the same set of pin functions in all operating modes. Figure 9.9 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 9.9 Port 9 Pin Configuration
, TxD
0
(input/output)/IRQ (input)
1 5
(input/output)/IRQ (input)
0 4
1
0
1
0
Rev. 3.00 Mar 21, 2006 page 277 of 814
Section 9 I/O Ports
, RxD , RxD ,
1 0 1
5
REJ09B0302-0300