Epson RX8900SA/CE - 8.2. Details of Registers; 8.2.1. Clock Counter (SEC - HOUR)

RX8900 SA / CE
Page - 8 ETM45E-01
8.2. Details of Registers
8.2.1. Clock counter (SEC - HOUR )
Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
00, 10 SEC

40 20 10 8 4 2 1
01, 11 MIN

40 20 10 8 4 2 1
02, 12 HOUR
 
20 10 8 4 2 1
)"o" indicates write-protected bits. A zero is always read from these bits.
 The clock counter counts seconds, minutes, and hours.
 The data format is BCD format
. For example, when the "seconds" register value is "0101 1001" it indicates 59
seconds.
Note with caution that writing non-existent time data may interfere with normal operation of the clock counter.
1) Second counter
Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
00, 10 SEC

40 20 10 8 4 2 1
This second counter counts from "00" to "01," "02," and up to 59 seconds, after which it starts again from
00 seconds.
2) Minute counter
Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
01, 11 MIN

40 20 10 8 4 2 1
This minute counter counts from "00" to "01," "02," and up to 59 minutes, after which it starts again from
00 minutes.
3) Hour counter
Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
02, 12 HOUR
 
20 10 8 4 2 1
This hour counter counts from "00" hours to "01," "02," and up to 23 hours, after which it starts again from
00 hours.