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RF5C01A Datasheet(PDF) 6 Page - RICOH electronics devices division |
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RF5C01A Datasheet(HTML) 6 Page - RICOH electronics devices division |
6 / 10 page RP/RF5C01A 6 • MODE register (Address Dh) *) When the Timer EN is set to 0, the 1-second counter and higher-order counters than the 1-second counter stop . If any carrying occurs in the lower-order counters than the 1 second counter while the Timer EN is 0, carrying will be held and avoided when the Timer EN changes from 0 to 1. Thus, no appar- ent delay is produced when the duration of the Timer EN = 0 is less than one second. D3 D2 D1 D0 Timer EN Alarm EN M1 M0 ¯ ¯ 0 0 MODE00 : Setting and read out of time 0 1 MODE01 : Setting and read out of alarm, 12-hour/24-hour and leap year 1 0 Read and Write of RAM of BLOCK10 1 1 Read and Write of RAM of BLOCK11 1 : Alarm output enabled 0 : Alarm output disabled (Note that 16Hz or 1Hz signals are not affected.) 1 : Counting time starts; 0 : the 1-second counter and higher-order than the 1-second counter stop • 12/24 select register (MODE01, Address Ah) D0=1 sets to 24-hour system ; D0=0 sets to 12-hour system. Set the 10-hour counter as D1=1 for p.m., D1=0 for a.m. • Leap year counter (MODE01, Address Bh) (D1, D0)=(0, 0) sets the counter for leap years. The counter value changes in order of (0, 0) (0, 1) (1, 0) (1, 1) (0, 0) repeatedly in the same timing as the year counter. • RESET controller/16Hz · 1Hz clock register. (Address Fh) D0=1 : Resets all alarm registers. D1=1 : Resets divider stages for seconds or smaller units. D2=0 : 16Hz clock pulse ON. D3=0 : 1Hz clock pulse ON. *) Addresses 0h to Dh are applicable both for Read and Write. *) Addresses Eh to Fh are applicable only for Write. |
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