UPD4991ACX Renesas Electronics America, UPD4991ACX Datasheet - Page 7

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

Specifications of UPD4991ACX

• Lead Free Status / RoHS Status: Supplier Unconfirmed

CHAPTER 1 OUTLINE OF PD4991A .............................................................................................
CHAPTER 2 OPERATIONS ...............................................................................................................
CHAPTER 3 ACCESS PROCEDURE ...............................................................................................
CHAPTER 4 ELECTRICAL SPECIFICATIONS AND INTERFACE .................................................
1.1 Features ................................................................................................................................
1.2 Pin Configuration ................................................................................................................
1.3 Block Diagram .....................................................................................................................
1.4 Oscillation Stage and 15-stage Divider ...........................................................................
1.5 Mode and Register Configuration ....................................................................................
1.6 Cautions (Be sure to observe the following.) .................................................................
2.1 Write Timing .........................................................................................................................
2.2 Read Timing .........................................................................................................................
2.3 Mode Details ........................................................................................................................
3.1 Writing and Reading Time .................................................................................................
3.2 Setting Alarm Time .............................................................................................................
3.3 Setting Interval Timer .........................................................................................................
4.1 Crystal Oscillation Circuit ..................................................................................................
4.2 Oscillation Characteristics and Accuracy .......................................................................
4.3 Adjusting Oscillation Frequency ......................................................................................
4.4 Back-up Circuit ....................................................................................................................
4.5 Power-fail Circuit ................................................................................................................
2.3.1
2.3.2
2.3.3
2.3.4
3.1.1
3.1.2
4.2.1
4.2.2
4.2.3
BASIC TIME MODE (MODE REG.
ALARM SET & TP1 CONTROL MODE (MODE REG.
ALARM SET & TP2 CONTROL MODE (MODE REG.
TEST MODE ..............................................................................................................................
Setting time ................................................................................................................................
Reading time .............................................................................................................................
Dependency on capacitance ....................................................................................................
Dependency on temperature ....................................................................................................
Dependency on supply voltage ................................................................................................
TABLE OF CONTENTS
0
H
or 3
H
) ......................................................................
1) ...................................................
2) ...................................................
10
13
15
15
17
18
37
37
44
45
47
47
47
52
53
54
11
11
19
26
30
33
37
39
48
49
51
7
7
8
5