RS5C321B Просмотр технического описания (PDF) - RICOH Co.,Ltd.
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RS5C321B Datasheet PDF : 33 Pages
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RS5C321A/B
2.3 32kHz clock pulse Control Register (BANK1, at Ah)
D3
D2
D1
D0
*
*
*
CLEN (For read/write operation)
* * 1) The “ ” mark indicates data which are set to 0 for read cycle and not written for write cycle.
*2) (CLEN)
32kHz clock pulse control bit
When the CLEN bit is set to 0, 32.768kHz clock pulse is output from 32KOUT pin.
When the CLEN bit is set to 1, 32KOUT pin is high impedance.
The CLEN bit is set to 0 when the XSTP=1 (Oscillator halt sensing).
3. Counters
3.1 Clock counter (BANK 0, at 0h-5h)
D3
D2
D1
D0
S8
S4
S2
S1 (For read/write) 1-second time digit (at 0h)
*
S40
S20
S10 (For read/write) 10-second time digit (at 1h)
M8
M4
M2
M1 (For read/write) 1-minute time digit (at 2h)
*
M40
M20
M10 (For read/write) 10-minute time digit (at 3h)
H8
H4
H2
H1 (For read/write) 1-hour time digit
(at 4h)
*
* P/A or H20 H10 (For read/write) 10-hour time digit
(at 5h)
* * 1) The “ ” mark indicates data which are set to 0 for read cycle and not set for write cycle.
*2) Any carry to 1-second digits from the second counter is disabled when the WTEN bit (of the control register 1) is set to 0.
*3) Time digit display (BCD code):
Second digits : Range from 00 to 59 and carried to minute digits when incremented from 59 to 00.
Minute digits : Range from 00 to 59 and carried to hour digits when incremented from 59 to 00.
Hour digits : Range as shown in the section on the 12/24 bit and carried to day and day-of-the-week digits when incremented from 11 p.m. to 12
a.m. or 23 to 00.
*4) Any registered imaginary time should be replaced with actual time as carrying to such registered imaginary time digits from lower-order ones cause
the clock counter to malfunction.
3.2 Day-of-the-week counter (BANK 0, at 6h)
D3
D2
D1
D0
*
W4
W2
W1 (For read/write) Day-of-the-week counter
* * 1) The “ ” mark indicates data which are set to 0 for read cycle and not set for write cycle.
*2) Day-of-the-week digits are incremented by 1 when carried to 1-day digits.
*3) Day-of-the-week digits display (incremented in septimal notation):
(W4, W2, W1)=(000) → (001) → ····· → (110) → (000)
The relation between days of the week and day-of-the-week digits is user changeable (e.g. Sunday=000).
*4) The (W4, W2, W1) should not be set to (111).
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