UPD4991ACX Renesas Electronics America, UPD4991ACX Datasheet - Page 32

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

Specifications of UPD4991ACX

• Lead Free Status / RoHS Status: Supplier Unconfirmed

2.3.3 ALARM SET & TP2 CONTROL MODE (MODE REG.
MODE). Address 0B
0C
0D
30
Address
In this mode, addresses 0
H
H
(1) Alarm registers (addresses 0
(2) TP2 FUNCTION CONTROL REGISTER (address 0B
0C
0D
0A
0B
0E
0F
08
09
0
1
2
3
4
5
6
7
is used to select 12- or 24-hour mode and enables or disables the leap year identification function. Addresses
through 0F
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
These registers operate in the same manner as in the TP1 CONTROL MODE. Refer to 2.3.2 (1).
These registers select the waveform that is to be output to TP2.
Selects 12- or 24-hour
mode and enables/
Second, units digit
disables leap year
Second, tens digit
H
Minute, units digit
Minute, tens digit
Day of week digit
Month, units digit
Month, tens digit
TP1 FUNCTION
Hour, units digit
Date, units digit
Hour, tens digit
Date, tens digit
are used in the same way as in the BASIC TIME MODE (refer to Table 2-10).
REGISTER 1
REGISTER 2
identification
Table 2-10. Register Assignment in ALARM SET & TP2 CONTROL MODE
REGISTER
CONTROL
CONTROL
CONTROL
Register
MODE
H
is used as a control register that selects an interval signal to be output to TP2, and address
H
through 0A
Alarm register
W/O. Selects TP2 output waveform.
Same as in BASIC TIME MODE
H
Sets and checks alarm time.
When these registers are set to 0F
assumed to coincide with the value of the time counter. When the alarm function is
not used, these registers can be used as a back-up memory of 4 bits 11 words (same
as in TP1 CONTROL MODE).
through 0A
H
are used as alarm registers (in the same manner as in the TP1 CONTROL
R/W
CHAPTER 2 OPERATIONS
H
)
12/24H mode
D
3
H
)
2)
identification
Description
Leap year
disable
H
, the digit corresponding to each register is
D
2
D
X
1
W/O: Write only
X: Don’t Care
D
X
0