CHAPTER 14 PORT FUNCTION
User’s Manual U13850EJ6V0UD
504
(1) Function of P10 pins
Port 10 is an 8-bit I/O port for which I/O settings can be controlled in 1-bit units. I/O settings are controlled via
the port 10 mode register (PM10).
In output mode, the values set to each bit are output to the port 10 register (P10). The port 10 function register
(PF10) can be used to specify whether outputs are normal outputs or N-ch open-drain outputs.
When using this port in input mode, the pin statuses can be read by reading the P10 register. Also, the P10
register (output latch) values can be read by reading the P10 register while in output mode.
A pull-up resistor can be connected in 1-bit units when specified via pull-up resistor option register 10 (PU10).
When using the alternate-function A5 to A12 pins, see the pin functions via the memory address output mode
register (MAM). At this time, be sure to set P10 and PM10 to 0.
When used as the KR0 to KR7 pins, noise is eliminated by the analog noise eliminator.
When using alternate-function pins as outputs, the ORed result of the port output and the alternate-function pin is
output from the pins.
When a reset is input, the settings are initialized to input mode.
Caution
When using port 10 as a real-time output port, set in accordance with 13. 5 Usage.
(2) Control register
(a) Port 10 mode register (PM10)
PM10 can be read/written in 1-bit or 8-bit units.
After reset:
FFH
R/W
Address: FFFFF034H
7
6
5
4
3
2
1
0
PM10
PM107
PM106
PM105
PM104
PM103
PM102
PM101
PM100
PM10n
Control of I/O mode (n = 0 to 7)
0
Output mode
1
Input mode
(b) Pull-up resistor option register 10 (PU10)
PU10 can be read/written in 8-bit or 1-bit units.
After reset:
00H
R/W
Address: FFFFF094H
7
6
5
4
3
2
1
0
PU10
PU107
PU106
PU105
PU104
PU103
PU102
PU101
PU100
PU10n
Control of on-chip pull-up resistor connection (n = 0 to 7)
0
Do not connect
1
Connect
Содержание V850/SB1
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