upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 189
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upd78f0730
Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0730.pdf
(518 pages)
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7.4.3 Square-wave output operation
compare register 5n (CR5n).
(TOE5n) of 8-bit timer mode control register 5n (TMC5n) to 1. This enables a square wave with any selected
frequency to be output (duty = 50%).
A square wave with any selected frequency is output at intervals determined by the value preset to 8-bit timer
The TO5n pin output status is inverted at intervals determined by the count value preset to CR5n by setting bit 0
<1> Set each register.
<2> After TCE5n = 1 is set, the count operation starts.
<3> The timer output F/F is inverted by a match of TM5n and CR5n. After INTTM5n is generated, TM5n is
<4> After these settings, the timer output F/F is inverted at the same interval and a square wave is output from
Note 8-bit timer/event counter 50: P17, PM17
Caution Do not write other values to CR5n during operation.
Remarks 1. For how to enable the INTTM5n signal interrupt, see CHAPTER 13 INTERRUPT FUNCTIONS.
Setting
• Clear the port output latch (P17 or P33)
• TCL5n: Select the count clock.
• CR5n:
• TMC5n: Stop the count operation, select the mode in which clear & start occurs on a match of TM5n and
cleared to 00H.
TO5n.
The frequency is as follows.
• Frequency = 1/2t (N + 1)
8-bit timer/event counter 51: P33, PM33
(N: 00H to FFH)
2. n = 0, 1
Compare value
CR5n.
Timer output enabled
(TMC5n = 00001011B or 00000111B)
LVS5n
1
0
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
LVR5n
0
1
Timer output F/F clear (0) (default output value of TO5n pin: low level)
Timer output F/F set (1) (default output value of TO5n pin: high level)
Preliminary User’s Manual U19014EJ1V0UD
Note
and port mode register (PM17 or PM33)
Timer Output F/F Status Setting
Note
to 0.
189
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