UPD78F0138 NEC, UPD78F0138 Datasheet - Page 213

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

(2) 8-bit timer H carrier control register 1 (TMCYC1)
(3) Port mode register 1 (PM1)
Remarks 1. f
Note Bit 0 is read-only.
This register controls the remote control output and carrier pulse output status of 8-bit timer H1.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
This register sets port 1 input/output in 1-bit units.
When using the P15/TOH0 and P16/TOH1/INTP5 pins for timer output, clear PM15 and PM16 and the output
latches of P15 and P16 to 0.
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
3. Figures in parentheses apply to operation at f
Address: FF6DH
TMCYC1
X
R
PM17
PM1n
: X1 input clock oscillation frequency
: Ring-OSC clock oscillation frequency
7
0
1
Figure 8-7. Format of 8-Bit Timer H Carrier Control Register 1 (TMCYC1)
After reset: FFH
Output mode (output buffer on)
Input mode (output buffer off)
RMC1
PM16
NRZ1
6
0
0
1
1
0
1
0
Figure 8-8. Format of Port Mode Register 1 (PM1)
After reset: 00H
Carrier output disabled status (low-level status)
Carrier output enabled status
(RMC1 = 1: Carrier pulse output, RMC1 = 0: High-level status)
NRZB1
PM15
CHAPTER 8 8-BIT TIMERS H0 AND H1
0
0
1
0
1
5
R/W
P1n pin I/O mode selection (n = 0 to 7)
User’s Manual U16228EJ2V0UD
Low-level output
High-level output
Low-level output
Carrier pulse output
PM14
0
R/W
4
Carrier pulse output status flag
Note
0
PM13
X
3
Remote control output
= 10 MHz, f
0
PM12
2
R
RMC1
= 240 kHz (TYP.).
PM11
1
NRZB1
PM10
0
NRZ1
<0>
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