upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 173

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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.
Remark n = 0, 1
Setting
cleared to 00H.
TO5n.
The frequency is as follows.
8-bit timer/event counter 51: P33, PM33
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
Frequency = 1/2t (N + 1)
(N: 00H to FFH)
Compare value
CR5n.
Timer output F/F inversion enabled
Timer output enabled
(TMC5n = 00001011B or 00000111B)
LVS5n
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
1
0
LVR5n
0
1
User’s Manual U16961EJ4V0UD
High-level output
Low-level output
Note
Timer Output F/F Status Setting
and port mode register (PM17 or PM33)
Note
to 0.
173