upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 310

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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(3) Port mode register 1 (PM1)
310
Cautions 1. When the internal oscillation clock is selected as the clock supplied to the CPU, the clock of
Remarks 1. Figures in parentheses are for operation with f
This register sets port 1 input/output in 1-bit units.
When using P10/SCK10/TxD0 as the clock output pin of the serial interface, clear PM10 to 0 and set the output
latch of P10 to 1.
When using P12/SO10 as the data output pin of the serial interface, clear PM12 and the output latches of P12 to
0.
When using P10/SCK10/TxD0 as the clock input pins of the serial interface, and P11/SI10/RxD0 as the data input
pins, 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 input sets this register to FFH.
Address: FF21H
Symbol
PM1
2. f
2. Do not write to CSIC10 while CSIE10 = 1 (operation enabled).
3. To use P10/SCK10/TxD0, P11/SI10/RxD0, and P12/SO10 as general-purpose ports, set CSIC10
4. The phase type of the data clock is type 1 after reset.
X
the internal oscillator is divided and supplied as the serial clock. At this time, the operation
of serial interface CSI10 is not guaranteed.
in the default status (00H).
PM17
PM1n
: High-speed system clock oscillation frequency
7
0
1
After reset: FFH
Output mode (output buffer on)
Input mode (output buffer off)
PM16
6
Figure 15-4. Format of Port Mode Register 1 (PM1)
CHAPTER 15 SERIAL INTERFACE CSI10
PM15
5
R/W
P1n pin I/O mode selection (n = 0 to 7)
User’s Manual U16962EJ3V0UD
PM14
4
PM13
3
X
= 10 MHz
PM12
2
PM11
1
PM10
0