UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 155

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

7.5.3 Square-wave output (8-bit resolution) operation
5n (CR5n).
at the interval time specified by the count value preset to CR5n. In this way, a square-wave of any frequency (duty
factor = 50%) can be output.
The 8-bit timer/event counters operate as a square wave output at the interval preset to 8-bit compare register
When bit 0 (TOE5n) of 8-bit timer mode control register 5n (TMC5n) is set to 1, the output status of TO5n is inverted
<Setting>
Remark n = 0 to 2
Note
Remark n = 0 to 2
TM5n count value
<1> Set each register.
<2> The count operation is started if TCE5n is set to 1.
<3> The timer output F/F is inverted if the values of TM5n and CR5n match.
<4> After that, the timer output F/F is inverted at the same interval, and a square-wave is output from TO5n.
Count clock
The initial value of TO5n output can be set with bits 2 and 3 (LVR5n and LVS5n) of 8-bit timer mode control
register 5n (TMC5n).
TO5n
• Clear the port latch and port mode register 2 (PM2) to 0.
• TCL5n:
• CR5n:
• TMC5n:
INTTM5n occurs and TM5n is cleared to 00H.
CR5n
Note
Count start
Enables inverting timer output F/F
Timer output enabled
Selects count clock
Compare value
Clear & start mode entered on match between TM5n and CR5n
00H
LVS5n
Figure 7-13. Square-Wave Output Operation Timing
1
0
01H
CHAPTER 7 8-BIT TIMER/EVENT COUNTER
LVR5n
02H
0
1
N
User’s Manual U13029EJ7V1UD
High-level output
Low-level output
TOE5n = 1
N – 1
Timer output F/F status setting
N
00H
01H
02H
N
N – 1
N
00H
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