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Examples Of External Circuits - Epson RTC-4543SA Applications Manual

Real time clock module
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RTC - 4543 SA/SB

8. Examples of External Circuits

Example 1. When used as an RTC + clock source
*1: FOUT output frequency setting (High: 1 Hz; low: 32.768 kHz)
*2: Prohibits FOUT output during back up, reducing current consumption.
Example 2. When used as a clock source (oscillator)
VDD
Power supply
Switching circuit
VDD
Power supply
Detection circuit
V
DD
RTC 4543
CE
WR
DATA
CLK
FOUT
*1
FSEL
*2
FOE
V
DD
RTC-4543
V
DD
CE
WR
V
DD
DATA
CLK
FOUT
1
FSEL
FOE
GND
Page - 9
VDD
0.1 F
GND
0.1 F
MQ - 252 - 03

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