upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 308

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) Port mode register 1 (PM1)
308
Cautions 1. When the Ring-OSC clock is selected as the clock supplied to the CPU, the clock of the Ring-
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 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 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. Clear CKP10 to 0 to use P10/SCK10/TxD0, P11/SI10/RxD0, and P12/SO10 as general-purpose
4. The phase type of the data clock is type 1 after reset.
X
OSC oscillator is divided and supplied as the serial clock. At this time, the operation of serial
interface CSI10 is not guaranteed.
port pins.
: X1 input 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 U16227EJ3V0UD
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