rs5c338a RICOH Co.,Ltd., rs5c338a Datasheet - Page 11

• Manufacturer Part Number: rs5c338a
• Description: 3-wire Serial Interface Real-time Clock Ics With Voltage Monitoring Function
• Manufacturer: RICOH Co.,Ltd.

2.1-3 CLEN2
For the R
high specifies generating clock pulses with the oscillation frequency of the 32.768-kHz crystal oscillator for output
from the 32KOUT pin. Conversely, setting both the CLEN1 and the CLEN2 bit to 1 or CLKC pin to low specifies
disabling (“L”) such output.
2.1-4 TEST
The TEST bit is used only for testing in the factory and should normally be set to 0.
2.1-5 CT
1) Pulse Mode : 2-Hz and 1-Hz clock pulses are output in synchronization with the increment of the second counter
CT
0
0
0
0
1
1
1
1
2
CLEN2
TEST
CT
0
1
×
0
1
0
0
1
1
0
0
1
1
2
1
5C338A, setting the CLEN2 bit or the CLEN1 bit (D3 in the control register 2) to 0, and the CLKC pin to
, CT
CT
1
0
1
0
1
0
1
0
1
, and CT
as illustrated in the timing chart on the next page.
0
32-kHz Clock Output Bit 2
Test Bit
Periodic Interrupt Selection Bits
Waveform mode
Pulse Mode
Pulse Mode
Level Mode
Level Mode
Level Mode
Level Mode
Enabling the 32-kHz clock circuit
Disabling the 32-kHz clock circuit
Normal operation mode
Test mode
—
—
0
Off (“H”)
Fixed at low (“L”)
2Hz (Duty cycle of 50%)
1Hz (Duty cycle of 50%)
Once per 1 second (Synchronized with second counter increment)
Once per minute (at 00 seconds of every minute)
Once per hour (at 00 minutes and 00 seconds of every hour)
Once per month (at 00 hours, 00 minutes, and 00 seconds of first day of every month)
Description
Interrupt cycle and falling timing
Description
Description
(Default setting)
(Default setting)
(Default setting)
R
×
5C338A
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