PCF8583T datasheet(6/37 Pages) PHILIPS

Part #	PCF8583T

Description	Clock and calendar with 240 x 8-bit RAM

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Manufacturer	PHILIPS [NXP Semiconductors]

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PCF8583

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Product data sheet

Rev. 06 — 6 October 2010

6 of 37

NXP Semiconductors

PCF8583

Clock and calendar with 240 x 8-bit RAM

7.3 Control and status register

The control and status register is defined as the memory location 00h with free access for

reading and writing via the I2C-bus. All functions and options are controlled by the

contents of the control and status register (see Figure 5).

Fig 5.

Control and status register

timer flag:

alarm flag:

alarm enable bit:

mask flag:

function mode:

00

01

10

11

hold last count flag:

logic 0:

logic 1:

stop counting flag:

logic 0:

logic 1:

7

6

5

4

321

0

MSB

LSB

013aaa370

memory location 00h

reset state: 0000 0000

alarm disabled: flags toggle

alarm control register to disabled

(memory locations 08h to 0Fh

are free RAM space)

logic 1:

enable alarm control register

(memory location 08h is the

alarm control register)

logic 0:

read locations 05h to 06h

unmasked

logic 1:

read date and month count

directly

50 % duty factor

seconds flag if alarm enable bit

is logic 0

50 % duty factor

minutes flag if alarm enable bit

is logic 0

logic 0:

clock mode 32.768 kHz

clock mode 50 Hz

event-counter mode

test modes

store and hold last count in

capture latches

count

count pulses

stop counting, reset divider

Similar Part No. - PCF8583T

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCF8583T	162Kb / 28P	Clock/calendar with 240 x 8-bit RAM 1997 Jul 15
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PCF8583T Datasheet(PDF) 6 Page - NXP Semiconductors

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