upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 306

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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(3) Port mode register 1 (PM1)
306
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
PM1 is used to set port 1 input/output in 1-bit units.
When using P10/SCK10 /TxD0 as the clock output pin of the serial interface, set PM10 to 0 and the output latch
of P10 to 1. When using P12/SO10 as the data output pin, clear PM12 and the output latch of P12 to 0.
When using P10/SCK10/TxD0 as the clock input pin of the serial interface, and P11/SI10/RxD0 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 input sets this register to FFH.
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).
: High-speed system clock oscillation frequency
Address: FF21H
Symbol
Figure 14-4. Format of Port Mode Register 1 (PM1)
PM1
PM17
PM1n
CHAPTER 14 SERIAL INTERFACE CSI10
7
0
1
PM16
Output mode (output buffer on)
Input mode (output buffer off)
User’s Manual U16961EJ4V0UD
6
After reset: FFH
P1n pin I/O mode selection (n = 0 to 7)
PM15
5
PM14
4
X
PM13
= 10 MHz.
R/W
3
PM12
2
PM11
1
PM10
0