NEC uPD78056Y - Manual (Page 206)

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CHAPTER 8 16-BIT TIMER/EVENT COUNTER
TOC0 1 1 0/1 0/1 0 0 0 0
TOE0 TOC01 LVR0 OSPT OSPE TOC04 LVS0
TO0 Output Enabled
Inversion of output on match of TM0 and CR00
Specified TO0 output F/F initial value
No inversion of output on match of TM0 and CR01
One-shot pulse output disabled
CRC0 0 0/1 0/1 0 0 0 0 0
CRC00 CRC01 CRC02
CR00 set as compare register
TMC0 0 0/1 1 1 0 0 0 0
OVF0 TMC01 TMC02 TMC03
Clear & start on match of TM0 and CR00
8.5.6 Square-wave output operation
Operates as square wave output with any selected frequency at intervals of the count value preset to the 16-bit
capture/compare register 00 (CR00).
The TO0/P30 pin output status is reversed at intervals of the count value preset to CR00 by setting bit 0 (TOE0)
and bit 1 (TOC01) of the 16-bit timer output control register (TOC0) to 1. This enables a square wave with any selected
frequency to be output.
Figure 8-29. Control Register Settings in Square-Wave Output Mode
(a) 16-bit timer mode control register (TMC0)
(b) Capture/compare control register 0 (CRC0)
(c) 16-bit timer output control register (TOC0)
Remark 0/1: Setting 0 or 1 allows another function to be used simultaneously with square-wave output.
See the description of the respective control registers for details.