SH7261 datasheet(672/1348 Pages) RENESAS

672 / 1348 page

Section 15 Realtime Clock (RTC)

Rev. 2.00 Sep. 07, 2007 Page 640 of 1312

REJ09B0320-0200

Figure 15.1 shows the block diagram of RTC.

RHRCNT

RSECCNT:

RMINCNT:

RHRCNT:

RWKCNT:

RDAYCNT:

RMONCNT:

RYRCNT:

R64CNT:

RCR1:

Second counter (8 bits)

Minute counter (8 bits)

Hour counter (8 bits)

Day of week counter (8 bits)

Date counter (8 bits)

Month counter (8 bits)

Year counter (16 bits)

64-Hz counter (8 bits)

RTC control register 1 (8 bits)

RMINCNT

Interrupt

control circuit

RDAYCNT

RYRCNT

RMONCNT

Oscillator

circuit

RTC_X1

RTC_X2

RCR2

RCR3

RWKCNT

RHRAR

RMINAR

RDAYAR

RWKAR

Externally

connected

circuit

Prescaler

32.768 kHz

128 Hz

ARM

PRD

CUP

RCR1

RTC operation

control circuit

R64CNT

RSECCNT

RSECAR

Count

Interrupt

signals

RSECAR:

RMINAR:

RHRAR:

RWKAR:

RDAYAR:

RMONAR:

RYRAR:

RCR2:

RCR3:

Second alarm register (8 bits)

Minute alarm registger (8 bits)

Hour alarm register (8 bits)

Day of week alarm register (8 bits)

Date alarm register (8 bits)

Month alarm register (8 bits)

Year alarm register (16 bits)

RTC control register 2 (8 bits)

RTC control register 3 (8 bits)

RMONAR

RYRAR

[Legend]

Figure 15.1 RTC Block Diagram

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