UPD4990AG Renesas Electronics America, UPD4990AG Datasheet - Page 10

• Manufacturer Part Number: UPD4990AG
• Manufacturer: Renesas Electronics America

Specifications of UPD4990AG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

8
(2) TP selection and control
(3) Serial command transfer mode setting
(4) Test mode setting
Modes permitted only for serial commands
Set [C
Set [C
TP = 64 Hz Set Mode [1, 0, 0] / [0, 1, 0, 0]
64 Hz (50 % duty) is output to the TP pin.
[C
TP = 256 Hz Set Mode [1, 0, 1] / [0, 1, 0, 1]
256 Hz (50 % duty) is output to the TP pin.
[C
TP = 2 048 Hz Set Mode [1, 1, 0] / [0, 1, 1, 0]
2 048 Hz (50 % duty) is output to the TP pin.
[C
TP = 4 098 Hz Set Mode [0, 1, 1, 1]
4 098 Hz (50 % duty) is output to the TP pin. The interval timer stops.
TP = 1-second Interval Set Mode (counter reset & start) [1, 0, 0, 0]
A 1-second interval signal is output to the TP pin.
TP = 10-second Interval Set Mode (counter reset & start) [1, 0, 0, 1]
A 10-second interval signal is output to the TP pin.
TP = 30-second Interval Set Mode (counter reset & start) [1, 0, 1, 0]
A 30-second interval signal is output to the TP pin.
TP = 60-second Interval Set Mode (counter reset & start) [1, 0, 1, 1]
A 60-second interval signal is output to the TP pin.
Interval Output Flag Reset [1, 1, 0, 0]
The interval signal output to the TP pin is reset.
The interval timer counter continue the operation.
Interval Timer Clock Run [1, 1, 0, 1]
The timer for outputting interval signals is reset then started.
Interval Timer Clock Stop [1, 1, 1, 0]
The timer for outputting interval signals stops.
The output status does not change.
3-bit parallel command setting mode
The year function is ineffective when commands are input through C
Generally, February involves 28 days. The 29th day can be set optionally. The next day of the February
29th can be set the March 1st automatically. The interval timer is in the halt state.
* The test mode is cancelled by [C
Serial command transfer mode
If a strobe signal is input with C
command register ([C
* The test mode is cancelled by [C
In this mode, the serial command register is not held with the Register Hold command. Accordingly, the serial
command can be executed irrespective of the mode if the CS pin is active.
The year function is effective in the serial command transfer mode.
2
2
2
, C
, C
, C
2
2
= [0, 0, 0]
= [0, 1, 0, 0] to [1, 1, 1, 0]
, C
, C
1
1
1
, C
, C
, C
1
1
, C
, C
0
0
0
]: The year function is ineffective and the interval timer stops.
]: The year function is ineffective and the interval timer stops.
]: The year function is ineffective and the interval timer stops.
0
0
] = [1, 1, 1]
] = [1, 1, 1] [C
3
', C
2
', C
3
[C
', C
2
1
, C
', C
2
2
', C
, C
1
0
, C
2
1
']) are received as a command; the year function is effective.
3
1
, C
[C
', C
, and C
', C
0
3
] / [C
1
', C
2
0
, C
', C
'] = [1, 1, 1, 1]
[C
2
0
3
', C
] = [0, 0, 0] to [1, 1, 0].
0
2
1
', C
', C
, C
pins set at the V
[C
1
2
1
', C
0
, C
', C
3
']
', C
0
0
']
1
]
', C
2
', C
0
']
1
', C
0
DD
']
level ([1, 1, 1]), the contents of the serial
2
, C
1
, and C
0
pins.
PD4990A