upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 259

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(3) Port mode register 1 (PM1)
This register sets port 1 input/output in 1-bit units.
When using P10/SCK10 as the clock output pin of the serial interface, clear PM10 to 0, and set the output latches
of P10 to 1.
When using P12/SO10 as the data output pin of the serial interface, clear PM12 and the output latch of P12 to 0.
When using P10/SCK10 as the clock input pin of the serial interface, and P11/SI10 as the data input pin, set
PM10 and PM11 to 1. At this time, the output latches of P10 and P11 may be 0 or 1.
PM1 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to FFH.
Address: FF21H
Symbol
Figure 11-4. Format of Port Mode Register 1 (PM1)
PM1
PM17
PM1n
CHAPTER 11 SERIAL INTERFACE CSI10
7
0
1
Preliminary User’s Manual U19014EJ1V0UD
PM16
Output mode (output buffer on)
Input mode (output buffer off)
6
After reset: FFH
P1n pin I/O mode selection (n = 0 to 7)
PM15
5
PM14
4
PM13
R/W
3
PM12
2
PM11
1
PM10
0
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