NEC PD78053(A) Network Card User Manual


 
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CHAPTER 8 16-BIT TIMER/EVENT COUNTER
TOC0 110/10/10000
TOE0TOC01LVR0OSPT 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 00/10/100000
CRC00CRC01CRC02
CR00 set as compare register
TMC0 00/1110000
OVF0TMC01TMC02TMC03
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.