NEC VR4181 mPD30181 User Manual page 224

(2) RTCL1CNTHREG (0x0B00 00D6)
Bit 15
Name Reserved
R/W R
RTCRST 0
Note
Other resets
Bit 7
Name RTCL1C23
R/W R
RTCRST 0
Other resets Note
Bit Name
15 to 8 Reserved
7 to 0 RTCL1C(23:16)
Note Continues counting.
These registers indicate the RTCLong1 timer's values. It counts down by a 32.768 kHz clock cycle and begins
counting at the value set to the RTCLong1 registers. An RTCLong1 interrupt occurs when the timer value reaches
0x00 0001 (at which point the timer returns to the start value and continues counting).
These registers have no buffers for read. Therefore, an illegal data may be read if the timer value changes during
a read operation. When using the read value as a data, be sure to read the registers twice and check that two read
vales are the same.
224
CHAPTER 11 REALTIME CLOCK UNIT (RTC)
14 13
Reserved Reserved
R R
0 0
Note Note
6 5
RTCL1C22 RTCL1C21 RTCL1C20
R R
0 0
Note Note
0 is returned when read
RTCLong1 timer bits 23 to 16
User's Manual U14272EJ3V0UM
12 11
Reserved Reserved Reserved
R R
0 0
Note Note
4 3
RTCL1C19 RTCL1C18
R R
0 0
Note Note
Function
10 9
Reserved Reserved
R R
0 0
Note Note Note
2 1
RTCL1C17 RTCL1C16
R R
0 0
Note Note Note
8
R
0
0
R
0