UPD4991ACX Renesas Electronics America, UPD4991ACX Datasheet - Page 36

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

Specifications of UPD4991ACX

• Lead Free Status / RoHS Status: Supplier Unconfirmed

34
Value Set to Mode Register
HEX
0A
0B
8
9
H
H
H
H
D
1,
1,
1,
1,
3
D
0,
0,
0,
1,
2
D
0,
0,
1,
0,
1
D
0
1
0
0
0
TEST
(BASIC TIME)
TEST
(BASIC TIME)
TEST
(BASIC TIME)
TEST
(ALARM SET
& TP1 CONTROL)
Operation Mode
Table 2-13. Test Modes of PD4991A
CHAPTER 2 OPERATIONS
Second
Second
Time data can be set and read, but the status of TP1 and TP2 is undefined.
Time data can be set and read, but the status of TP1 and TP2 is undefined.
Second
Time data can be set and read, but the status of TP1 and TP2 is undefined.
Second
Sets alarm timer, selects TP1 output mode, and enables or disables leap
year identification. However, the status of TP1 and TP2 is undefined.
In this mode, time data cannot be written or read.
Day of
Minute
Minute
Year
Date
week
Year
Year
Year
32.768 kHz (fast-forward of 32768 times)
32.768 kHz, Month
32.768 kHz, Hour
32.768 kHz, Hour
Second
Second
Month
Month
Month
Month
Hour
A carry from day to month does not occur.
Day of
32.768 kHz
Minute
Day of
32.768 kHz
Day of
32.768 kHz
Date
week
week
week
Day
Day
Operation
32.768 kHz
32.768 kHz
32.768 kHz
Second
Hour
Hour
Hour
A carry from minute to hour
does not occur.
A carry from minute to hour
does not occur.
Minute
32.768 kHz
32.768 kHz
32.768 kHz
Second
32.768
kHz