UPD4991ACX Renesas Electronics America, UPD4991ACX Datasheet - Page 33

• Manufacturer Part Number: UPD4991ACX
• Manufacturer: Renesas Electronics America

Specifications of UPD4991ACX

• Lead Free Status / RoHS Status: Supplier Unconfirmed

0C
08
09
0A
0B
H
H
H
H
H
HEX
REPEAT output
(a) 0.1- to 60-sec INTERVAL output
(b) BUSY
(c) INTERVAL REPEAT/INTERVAL 1 SHOT
1-shot output
0
1
2
3
4
7
H
H
H
H
H
H
These registers output an interval signal with a cycle of 0.1 to 60 seconds and a pulse width of 30.5 s
during the L period.
This is the count flag of the time counter and is the same as the BUSY signal in the TP1 CONTROL MODE.
These registers control the repetition of the interval signal. Figure 2-10 shows the differences between
the two.
If CONTROL REGISTER 2 described earlier is used, the control operation shown in Figure 2-11 can be
performed.
DATA
D
X, 0, 0, 0
X, 0, 0, 1
X, 0, 1, 0
X, 0, 1, 1
X, 1, 0, 0
0, 1, 1, 1
0, X, X, X
1, X, X, X
3
D
2
START
START
D
1
D
0
Table 2-11. TP2 FUNCTION CONTROL REGISTER
INTERVAL REPEAT
INTERVAL 1 SHOT
0.1 sec INTERVAL
10 sec INTERVAL
30 sec INTERVAL
60 sec INTERVAL
T
1 sec INTERVAL
BUSY signal
T
Operation
Figure 2-10. TP2 Output Waveform
CHAPTER 2 OPERATIONS
30.5 s
T
Interval timer output with pulse width of 30.5 s during L period
Count flag of time counter
Successively performs interval output
Performs interval output in only one cycle
30.5 s
Description
X: Don’t Care
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