upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 380
upd70f3017ay
Manufacturer Part Number
upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
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(1) Function of P9 pins
(2) Control register
380
After reset:
PM9
Port 9 is a 7-bit I/O port for which I/O settings can be controlled in 1-bit units. I/O settings are controlled via the
port 9 mode register (PM9).
In output mode, the values set to each bit are output to port 9 (P9).
When using this port in input mode, the pin statuses can be read by reading P9. Also, the P9 (output latch) values
can be read by reading P9 while in output mode.
A software pull-up function is not implemented.
When using the alternate-function external expansion function pins, set the pin functions via the memory
expansion mode register (MM).
When a reset is input, the settings are initialized to input mode.
Caution When using port 9 as an I/O port, set the BIC bit of the system control register (SYC) to 0.
(a) Port 9 mode register (PM9)
PM9 can be read/written in 1-bit or 8-bit units.
After the system is reset, the BIC bit is 0.
7FH
PM9n
7
0
0
1
R/W
Output mode
Input mode
PM96
6
PM95
CHAPTER 14 PORT FUNCTION
5
User’s Manual U12768EJ4V1UD
Address: FFFFF032H
PM94
4
Control of I/O Mode (n = 0 to 6)
PM93
3
PM92
2
PM91
1
PM90
0
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