UPD4991AGS Renesas Electronics America, UPD4991AGS Datasheet - Page 12

• Manufacturer Part Number: UPD4991AGS
• Manufacturer: Renesas Electronics America

Specifications of UPD4991AGS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

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