Carrier Generator Mode Operation - NEC V850ES/KE1+ User Manual

9.4.3 Carrier generator mode operation

The carrier clock generated by 8-bit timer Hn is output using the cycle set with 8-bit timer/event counter 5n.
In the carrier generator mode, 8-bit timer/event counter 5n is used to control the extent to which the carrier pulse of
8-bit timer Hn is output, and the carrier pulse is output from the TOHn output.
Remarks 1. For the alternate-function pin (TOHn) settings, refer to Table 4-12 Settings When Port Pins Are
Used for Alternate Functions.
2. For INTTMHn interrupt enable, refer to CHAPTER 17 INTERRUPT/EXCEPTION PROCESSING
FUNCTION.
(1) Carrier generation
In the carrier generator mode, the CMPn0 register generates a waveform with the low-level width of the carrier
pulse and the CMPn1 register generates a waveform with the high-level width of the carrier pulse.
During 8-bit timer Hn operation, the CMPn1 register can be rewritten, but rewriting of the CMPn0 register is
prohibited.
(2) Carrier output control
Carrier output control is performed with the interrupt request signal (INTTM5n) of 8-bit timer/event counter 5n
and the TMCYCn.NRZBn and TMCYCn.RMCn bits. The output relationships are as follows.
Remark n = 0, 1
CHAPTER 9 8-BIT TIMER H
RMCn Bit NRZBn Bit
0 0
0 1
1 0
1 1
User's Manual U16896EJ2V0UD
Output
Low-level output
High-level output
Low-level output
Carrier pulse output
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