UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 349

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) Port mode register 7 (PM7)
Remarks 1. f
This register sets port 7 input/output in 1-bit units.
When using the P72/SGOA/PCL pin for clock output and the P73/SGO/SGOF/BUZ pin for buzzer output, set
PM72, PM73 and the output latch of P72, P73 to 0.
PM7 is set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PM7 to FFH.
2. f
Address: FF27H
Symbol
PM7
PRS
SUB
: Peripheral hardware clock frequency
: Subsystem clock frequency
CHAPTER 10 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER
PM7n
7
0
1
1
Figure 10-3. Format of Port Mode Register 7 (PM7)
After reset: FFH
Output mode (output buffer on)
Input mode (output buffer off)
PM76
6
Preliminary User’s Manual U19748EJ1V0UD
PM75
5
P7n pin I/O mode selection (n = 0 to 6)
R/W
PM74
4
PM73
3
PM72
2
PM71
1
PM70
0
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