UPD4991ACX Renesas Electronics America, UPD4991ACX Datasheet - Page 12
UPD4991ACX
Manufacturer Part Number
UPD4991ACX
Description
Manufacturer
Renesas Electronics America
Datasheet
1.UPD4991ACX.pdf
(67 pages)
Specifications of UPD4991ACX
Lead Free Status / RoHS Status
Supplier Unconfirmed
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X
1.3 Block Diagram
10
CS
CS
WE
OUT
OE
X
D
D
D
D
A
A
A
A
IN
1
2
3
2
1
0
3
2
1
0
Figure 1-2 shows the block diagram of the PD4991A.
OSC
Binary Divider
15-stage
1/2
15
CLOCK STOP
CLOCK WAIT
CHAPTER 1 OUTLINE OF PD4991A
Figure 1-2. Block Diagram
SEC.
MIN.
TIMING PULSE GENERATOR
CONTROL REGISTER 1
CONTROL REGISTER 2
ALARM REGISTER
HOUR
MODE REGISTER
TIME COUNTER
COMPARATOR
WEEK
DAY
MONTH YEAR
MPX
Nch OPEN DRAIN
TP
TP
1
2
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