UPD78F0411GA-GAM-AX Datasheet, PDF (195/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 6 16-BIT TIMER/EVENT COUNTERS 00
6.4.7 One-shot pulse output operation
A one-shot pulse can be output by setting bits 3 and 2 (TMC003 and TMC002) of the 16-bit timer mode control
register 00 (TMC00) to 01 (free-running timer mode) or to 10 (clear & start mode entered by the TI000 pin valid edge)
and setting bit 5 (OSPE00) of 16-bit timer output control register 00 (TOC00) to 1.
When bit 6 (OSPT00) of TOC00 is set to 1 or when the valid edge is input to the TI000 pin during timer operation,
clearing & starting of TM00 is triggered, and a pulse of the difference between the values of CR000 and CR010 is
output only once from the TO00 pin.
Cautions 1. Do not input the trigger again (setting OSPT00 to 1 or detecting the valid edge of the TI000
pin) while the one-shot pulse is output. To output the one-shot pulse again, generate the
trigger after the current one-shot pulse output has completed.
2. To use only the setting of OSPT00 to 1 as the trigger of one-shot pulse output, do not change
the level of the TI000 pin or its alternate function port pin. Otherwise, the pulse will be
unexpectedly output.
Remarks 1. For the setting of the I/O pins, see 6.3 (6) Port mode register 3 (PM3).
2. For how to enable the INTTM000 signal interrupt, see CHAPTER 17 INTERRUPT FUNCTIONS.
Figure 6-44. Block Diagram of One-Shot Pulse Output Operation
TI000 edge detection
OSPT00 bit
OSPE00 bit
Count clock
Operable bits
TMC003, TMC002
Clear
Timer counter
(TM00)
Match signal
Compare register
(CR000)
Match signal
Output
controller
Interrupt signal
(INTTM000)
TO00
output
TO00 pin
Interrupt signal
(INTTM010)
Compare register
(CR010)
User’s Manual U18698EJ1V0UD
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