UPD30102 Datasheet, PDF (350/701 Pages) NEC – 64/32-bit Microprocessor

CHAPTER 16 RTC (REALTIME CLOCK UNIT)
(2) TCLKHREG (0x0B00 01C2)
Bit
Name
R/W
RTCRST
Other resets
D15
Reserved
R
0
0
D14
Reserved
R
0
0
D13
Reserved
R
0
0
D12
Reserved
R
0
0
D11
Reserved
R
0
0
D10
Reserved
R
0
0
D9
Reserved
R
0
0
D8
TCLKP[24]
R/W
0
0
Bit
D7
Name
TCLKP[23]
R/W
R/W
RTCRST
0
Other resets
0
D6
TCLKP[22]
R/W
0
0
D5
TCLKP[21]
R/W
0
0
D4
TCLKP[20]
R/W
0
0
D3
TCLKP[19]
R/W
0
0
D2
TCLKP[18]
R/W
0
0
D1
TCLKP[17]
R/W
0
0
D0
TCLKP[16]
R/W
0
0
Bit
D[15:9]
D[8:0]
Name
Reserved
TCLKP[24:16]
Function
Write 0 when writing. 0 is returned after a read.
[24:16] for TClock counter cycle
Use these registers to set the TCLK counter cycle. The TCLK counter begins its countdown at the value written
to these registers.
A write operation is valid once values have been written to both registers (TCLKLREG and TCLKHREG).
Caution The TCLK unit is stopped when all zeros are written.
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