Sharp MD-MS200W Service Manual page 45

IC406 VHiRTC4543B-1 (RTC4543B):Rialtime Clock
Terminal Name
Pin No.
1*-4* NC
5 FOE
6 WR
7 FSEL
8 CE
9 GND
10 FOUT
11 DATA
12 CLK
13* NC
14 VDD
15*-18* NC
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input/Output
— Be sure to use this terminal in OPEN state so as to get more stable connected inside,
and is the low truth line drawing oscillation.
Input When this terminal is on H level, frequency selected by the FSEL terminal is output from
the FOUT terminal. When this terminal is on L level, the FOUT terminal is set to high-
impedance.
Input DATA terminal input/output selection terminal
H level: Data input (RTC write)
L level: Data output (RTC read)
Input Frequency to be output from the FOUT terminal is selected.
H level: 1 Hz
Input Chip enable input terminal
H level: Enable
When this terminal is on L level, the DATA terminal is set to high-impedance state, and
the CLK, DATA, and WR terminals are set to input reception disabled state. When this
terminal is on L level, TM bit is cleared.
— To be connected to the negative (ground) side of power supply.
Output Frequency selected by the FSEL terminal is output. 1 Hz output is synchronized with
internal 1 sec signal. This terminal is not affected by the CE terminal.
In/Output Input/output terminal to be used for data writing and reading
Input Serial clock input terminal.
At the rise edge data is input in write mode but in read mode data is output.
— Be sure to use this terminal in OPEN state so as to get more stable connected inside,
and is the low truth line drawing oscillation.
— To be connected to the positive side of power supply.
— Be sure to use this terminal in OPEN state so as to get more stable connected inside,
and is the low truth line drawing oscillation.
MD-MS200W/MD-MS200/MD-MS200H
Function
L level: 32.768 kHz
– 45 –