SH7261 datasheet(684/1348 Pages) RENESAS

684 / 1348 page

Section 15 Realtime Clock (RTC)

Rev. 2.00 Sep. 07, 2007 Page 652 of 1312

REJ09B0320-0200

15.3.11

Hour Alarm Register (RHRAR)

RHRAR is an alarm register corresponding to the BCD coded hour counter RHRCNT of the RTC.

When the ENB bit is set to 1, a comparison with the RHRCNT value is performed. From among

RSECAR/RMINAR/RHRAR/RWKAR/RDAYAR/RMONAR/RCR3, the counter and alarm

coincides, an alarm flag of RCR1 is set to 1.

The assignable range is from 00 through 23

+ ENB bits (practically in BCD), otherwise operation

errors occur.

The ENB bit in RHRAR is initialized by a power-on reset or in deep standby mode. The other bits

are not initialized by a power-on reset or manual reset, or in deep standby and software standby

modes.

R/W

Bit:

Initial value:

R/W:

ENB

—

——————

10 hours

1 hour

Bit

Bit Name

Initial

Value

R/W

Description

ENB

R/W

When this bit is set to 1, a comparison with the

RHRCNT value is performed.



Reserved

This bit is always read as 0. The write value should

always be 0.

5, 4

10 hours

Undefined

R/W

Ten's position of hours setting value

3 to 0

1 hour

Undefined

R/W

One's position of hours setting value

SH7261 Datasheet(PDF) 684 Page - Renesas Technology Corp

SH7261 Datasheet(HTML) 684 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL