NEC 78K0 User Manual page 238

Remarks 1. f : X1 input clock oscillation frequency
X
2. f : Ring-OSC clock oscillation frequency
R
3. Figures in parentheses apply to operation at f
(2) 8-bit timer H carrier control register 1 (TMCYC1)
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.
Figure 9-7. Format of 8-Bit Timer H Carrier Control Register 1 (TMCYC1)
Address: FF6DH
TMCYC1
Note Bit 0 is read-only.
(3) Port mode register 1 (PM1)
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 After reset: FFH
Symbol 7
PM1 PM17
PM1n
0 Output mode (output buffer on)
1 Input mode (output buffer off)
238
CHAPTER 9 8-BIT TIMERS H0 AND H1
Note
After reset: 00H R/W
0 0 0
RMC1 NRZB1
0 0
Low-level output
0 1 High-level output
1 0 Low-level output
1 1
Carrier pulse output
NRZ1 Carrier pulse output status flag
0
Carrier output disabled status (low-level status)
1
Carrier output enabled status
(RMC1 = 1: Carrier pulse output, RMC1 = 0: High-level status)
Figure 9-8. Format of Port Mode Register 1 (PM1)
R/W
6 5 4
PM16 PM15 PM14
P1n pin I/O mode selection (n = 0 to 7)
User's Manual U15947EJ2V0UD
= 10 MHz, f = 240 kHz (TYP.).
X R
0 0 RMC1 NRZB1
Remote control output
*
3 2 1
PM13 PM12 PM11
<0>
NRZ1
0
PM10