VR4102 datasheet(342/701 Pages) NEC

342 / 701 page

CHAPTER 16 RTC (REALTIME CLOCK UNIT)

342

(2) RTCL1HREG (0x0B00 00D2)

Bit

D15

D14

D13

D12

D11

D10

Name

Reserved

R/W

RRR

RTCRST

Other resets

Note

Bit

D6D5

D4D3D2

Name

RTCL1P[23]

RTCL1P[22]

RTCL1P[21]

RTCL1P[20]

RTCL1P[19]

RTCL1P[18]

RTCL1P[17]

RTCL1P[16]

R/W

RTCRST

Other resets

Note

Bit

Name

Function

D[15:8]

Reserved

Write 0 when writing. 0 is returned after a read.

D[7:0]

RTCL1P[23:16]

[23:16] for RTCLong1 counter cycle

Note

Previous value is retained

Use these registers to set the RTCLong1 counter cycle. The RTCLong1 counter begins its countdown at the

value written to these registers.

A write operation is valid once values have been written to both registers (RTCL1LREG and RTCL1HREG).

Cautions 1.

The RTC unit is stopped when all zeros are written.

Any combined setting of “RTCL1HREG = 0x0000” and

“RTCL1LREG = 0x0001, 0x0002,

0x0003, 0x0004” is prohibited.

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