SH7721 datasheet(622/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 17 Realtime Clock (RTC)

Rev. 3.00 Jan. 18, 2008 Page 560 of 1458

REJ09B0033-0300

Figure 17.1 shows the block diagram of RTC.

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

Month counter (8 bits)

Year counter (16 bits)

64-Hz counter (8 bits)

RTC control register 1 (8 bits)

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

[Legend]

RHRCNT

RMINCNT

Interrupt

control circuit

RDAYCNT

RYRCNT

RMONCNT

Oscillator

circuit

EXTAL_RTC

XTAL_RTC

RCR2

RCR3

RWKCNT

RHRAR

RMINAR

RDAYAR

RWKAR

Externally

connected

circuit

Prescaler

32.768kHz

128Hz

ATI

PRI

RCR1

RTC operation

control circuit

R64CNT

RSECCNT

RSECAR

RTCCLK (16kHz)

Count

Interrupt

signals

RMONAR

RYRAR

Figure 17.1 RTC Block Diagram

SH7721 Datasheet(PDF) 622 Page - Renesas Technology Corp

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