Rainbow-electronics AT73C246 Uživatelský manuál stáhnout pdf (Strana 41)

11050A–PMAAC–07-Apr-10

AT73C246

11.10.1 RTC Register Read/Write Operation

Figure 11-11. RTC Read Operation

Figure 11-12. RTC Write Operation

RTC_EN

RTC_SEL

RTC_WRITE

RTC_DATA

RTC_ADDR

WRITE

RTC_ADDR

READ

RTC_DATA3

READ

RTC_DATA2

READ

RTC_DATA1

READ

RTC_DATA0

WRITE 02

@RTC_CTRL

WRITE 03

@RTC_CTRL

WRITE 02

@RTC_CTRL

WRITE 00

@RTC_CTRL

RTC_EN = 0

RTC_SEL = 1

RTC_WRITE = 0

RTC_EN = 1

RTC_SEL = 1

RTC_WRITE = 0

RTC_EN = 0

RTC_SEL = 1

RTC_WRITE = 0

RTC_EN = 0

RTC_SEL = 0

RTC_WRITE = 0

TWI ACCESS

RTC_EN

RTC_SEL

RTC_WRITE

RTC_DATA

RTC_ADDR

WRITE

RTC_ADDR

WRITE

RTC_DATA3

WRITE

RTC_DATA2

WRITE

RTC_DATA1

WRITE

RTC_DATA0

WRITE 06

@RTC_CTRL

WRITE 07

@RTC_CTRL

WRITE 06

@RTC_CTRL

WRITE 00

@RTC_CTRL

RTC_EN = 0

RTC_SEL = 1

RTC_WRITE = 1

RTC_EN = 1

RTC_SEL = 1

RTC_WRITE = 1

RTC_EN = 0

RTC_SEL = 1

RTC_WRITE = 1

RTC_EN = 0

RTC_SEL = 0

RTC_WRITE = 0

TWI ACCESS

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