RX − 8564 LC

3. Terminal description

3.1. Terminal connections

RX − 8564 LC

1.

N.C.

 

 

12.

N.C.

2.

N.C.

# 1

# 12

11.

CLKOE

 

 

 

 

3.

N.C.

 

 

10.

VDD

4.

N.C.

 

 

9.

CLKOUT

5.

/INT

# 6

# 7

8.

SCL

 

 

6.

GND

 

 

7.

SDA

 

 

VSOJ −

12pin

 

 

3.2. Pin Functions

SignalI/O

 

 

 

 

Function

 

name

 

 

 

 

 

 

 

 

 

 

 

 

SCL

Input

This is the serial clock input pin for I2C Bus communications.

 

 

 

 

 

 

 

This pin's signal is used for input and output of address, data, and ACK bits,

SDA

Bi-Directional

synchronized with the serial clock used for I2C communications.

Since the SDA pin is an N-ch open drain pin during output, be sure to connect a suitable

 

 

 

 

pull-up resistance relative to the signal line capacity.

 

 

 

 

 

 

 

The CLKOUT pin is a clock output pin (C-MOS output) with the output control function.

 

 

The CLKOE pin can be used in combination with the FE bit, FD1 bit, and FD0 bit to

 

 

control the output mode of the CLKOUT output pin.

 

CLKOUT

Output

The CLKOE input pin can be used in combination with the FE bit, FD1 bit, and FD0 bit to

 

 

select the frequency output from the CLKOUT output pin (32.768 kHz, 1024 Hz, 32 Hz, or

 

 

1 Hz) or to stop output.

 

 

 

 

 

When output is stopped, the CLKOUT output pin is at low level ( = " L " ).

 

 

 

CLKOE pin

FE

CLKOUT pin

 

 

 

 

 

 

input

bit

output

 

 

 

" H "

 

1

Output

( C-MOS )

 

 

 

 

0

OFF

( " L " )

 

 

 

 

 

CLKOE

Input

 

" L "

 

1

OFF

( " L " )

 

 

0

OFF

( " L " )

 

 

 

 

 

 

 

During the initial power-on (when power is applied from 0 V), if the CLKOE input pin is at

 

 

high level ( = " H " ), the power-on reset function selects 32.768 kHz as the frequency.

 

 

 

/INT

Output

This pin outputs alarm signals, fixed timer interrupt signals, and other interrupt signals at

low level ( = " L " ). This pin is an open drain pin.

 

 

 

 

 

 

 

 

VDD

−

This pin connects to the plus side of the power.

 

 

 

 

GND

−

This pin connects to the minus side (ground) of the power.

 

 

 

N.C.

−

This pin is not connected internally. Be sure to connect using OPEN, or GND or VDD.

 

 

 

 

 

 

 

 

Note : Be sure to connect a bypass capacitor rated at least 0.1 µF between VDD and GND.

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ETM12E-01