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(3) Sub-count register (SUBC)
The SUBC register is a 15-bit register that counts the reference time of the real-time counter. It counts 1
second using the 32.768 kHz clock. This register is read-only, in 16-bit or 8-bit units.
This register is not initialized by RESET input or when RTCE = 0.
After reset: Undefined
SUBC
(4) Second count register (SEC)
This 8-bit register uses a value of 0 to 59 (decimal) to indicate the count value in seconds. This register is
read-only, in 8-bit units.
This register is not initialized by RESET input or when RTCE = 0.
After reset: Undefined
SEC
(5) Second count setting register (SECB)
This is an 8-bit register for setting the second count. This register is read-only, in 8-bit units. Set a count value
in a range of 0 to 59 (decimal) to this register. Do not set a count value of 60 (decimal) or greater.
RESET input clears this register to 00H.
After reset:
SECB
266
CHAPTER 8 REAL-TIME COUNTER FUNCTION
R
Address:
15
14
0
R
Address:
7
6
5
0
0
SEC5
00H
W
Address:
FFFFF6EAH
7
6
5
0
0
SEC5
Preliminary User's Manual U15905EJ1V0UD
FFFFF6E2H
SUBC14 to SUBC0
FFFFF6E4H
4
3
2
SEC4
SEC3
SEC2
4
3
2
SEC4
SEC3
SEC2
0
1
0
SEC1
SEC0
1
0
SEC1
SEC0
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