HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 195
HD6435348R
Manufacturer Part Number
HD6435348R
Description
Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
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9.10 Port 9
9.10.1 Overview
Port 9 is an 8-bit input/output port with the pin configuration shown in figure 9-21. In addition to
general-purpose input and output, its pins are used for the output compare A signals from free-
running timers 2 and 3, for PWM timer output, and for input and output by the on-chip serial
communication interfaces (SCI1 and SCI2). The pin functions are the same in all MCU operating
modes.
Outputs from port 9 can drive one TTL load and a 30 pF capacitive load. They can also drive a
Darlington transistor pair.
9.10.2 Port 9 Registers
Register Configuration: Table 9-16 lists the registers of port 9.
Table 9-16 Port 9 Registers
Name
Port 9 data direction register
Port 9 data register
* The SCI2 functions of P9
Port
9
Figure 9-21 Pin Functions of Port 9
Abbreviation
P9DDR
P9DR
P9
P9
P9
P9
P9
P9
P9
P9
2
, P9
7
6
5
4
3
2
1
0
(input/output) / SCK
(input/output) / RXD
(input/output) / TXD
(input/output) / SCK
(input/output) / RXD
(input/output) / TXD
(input/output) / FTOA
(input/output) / FTOA
3
, and P9
178
4
Read/Write
W
R/W
cannot be combined with the PWM functions.
1
2
1
2
1
2
3
2
(output)
(output)* / PW
(input/output)
(input/output)* / PW
(input)
(input)* / PW
(output)
(output)
Initial Value
H'00
H'00
2
1
(output)
(output)
3
(output)
Address
H'FEFE
H'FEFF
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