RTC-4573 Ver la hoja de datos (PDF) - Seiko Epson Corp

Número de pieza

componentes Descripción

Fabricante

RTC-4573

Serial RTC with Alarm and Timer

Seiko Epson Corp 

n Pin Connection

1. N.C

#1

2. N.C

3 N.C

4 N.C

5 CE1

6 DATA

7. CLK

8. N.C

#9

9 GND

18 N.C

#18

17 N.C

16 N.C

15 N.C

14 VDD

13 FOUT

12 CE0

11. / AIRQ

#10

10 / TIRQ

Symbol

CE1

DATA

CLK

GND

Pin-No.

5

6

7

9

I/O

Function

Chip enable 1 input pin.

This terminal has pull-down resistor built-in. Access to this RTC is possible in

Input "H" level both CE0,CE1 terminal. FOUT terminal can output frequency when

inputs "H" level into this terminal regardless of state of CE0 terminal. FOUT

terminal is high impedance state in input "L" level.

This I/O pin is used to for setting write mode/read mode, for writing an

Bi-

address, and for reading and writing data. This pin functions either as an

directional input pin or an output pin, according to the write mode/read mode setting

made in the first 8 bits of input data following the rising edge of the CE input.

Shift clock input pin. In write mode, the data is read from the DATA pin at

Input the rising edge of the CLK signal; in read mode, the data is output from the

DATA pin at the rising edge of the CLK signal.

-

Connect to the negative (ground) line of the power supply.

/ TIRQ

10

Output Open drain interrupt output pin for the interval timer.

/ AIRQ

11

Output Output Open drain interrupt output pin for alarms.

CE0

FOUT

Chip enable 0 input pin.

When high, access to the internal registers is enabled. While low, the

12

Input DATA pin goes to high impedance. When the CE pin is set low, the fr, TEST,

and RESET bits are forcibly cleared to "0".Set this pin low when turning the

power on, when the device is not to be accessed, and when using the

backup power supply. This pin does not affect FOUT terminal.

13

Output Frequency output terminal. Frequency is selectable by software.

VDD

14

-

Connect to the positive line of the power supply.

Access is possible between 1.6 and 5.5V

N.C.

1,2,3,

4,8,

15,16,

Although these pins are not connected internally, they should always be left

open in order to obtain the most stable oscillation possible.

17,18

* Always connect a passthrough capacitor of at least 0.1mF as close as possible between VDD and GND.

Page-2

Aug.1998

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