Real time clock module
Epson Toyocom
Product Number (Please contact us)
RX-4575LC : Q414575C1000100
Built-in external event detection.
SERIAL INTER FACE REAL TIME C LOCK MODULE
RX - 4575 LC
•
Built in frequency adjusted 32.768 kHz crystal unit.
•
Interface Type
:
3-wire serial interface
•
Operating voltage range
:
1.6 V
∼
5.5 V
•
Wide timekeeper voltage range
:
1.3 V
∼
5.5 V
•
Low backup current
:
0.35
µ
A / 3 V ( Typ. )
•
External event detection.
:
Chattering free input port
∗
2.
(The various functions include full calendar, alarm, timer.)
Actual size
Block diagram
32.768 kHz
OSC
DIVIDER
Overview
•
Event detection.
CLOCK and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
EVENT DETECT
REGISTER
CONTROL
REGISTER
INTERFACE
CIRCUIT
SHIFT REGISTER
FOUT
FOE
/ IRQN
/ EIRQN
EINA
EINB
DATA
CLK
CE 1
CE 0
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
INPUT
CONTROLLER
BUS
•
Performance of event input terminal.
・Selectable
Hi detection or Lo detection.
・Recognition
of detection is available both the hardware
interrupt and the monitor via software.
・Automatic
interrupt release mode is available.
・The
all 'OR' interrupt output is possible via alarm,
timer and event detection.
・As
for the chattering filter,
following are prepared for. ( 8 ms, 31 ms, 62 ms, 125 ms )
・Built-in
resistor connect and release is possible via
software. Selectable pull-up or pull-down.
・Built
in 12 bit counter.
・Timing
period are 1 min, 1 s, 64 Hz, 4096 Hz.
・Alarm
setting is possible by combination of a day,
hours, and minutes.
•
Timer function
•
Alarm function
Pin Function
Signal Name Input / Output
EINA
Input
EINB
CE 0
Input
CE 1
CLK
Input
DATA
FOUT
FOE
/ EIRQ
/ IRQ
V
DD
GND
Bidirectional
Output
Input
Output
Output
-
-
Functions
External event input pin.
Interface is possible when both CE0 and CE1 is high level.
Serial Clock input pin.
Data input and output pin.
32.768 kHz clock output pin ( C-MOS ) .
Output is Hi-Z when OFF.
32kHz is output when input is Hi, 32 kHz is OFF when input is Lo.
Interrupt output pin. ( N-ch open drain )
Interrupt output pin. ( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
Terminal connection / External dimensions
(Unit:mm)
RX
−
4575 LC
0.5
1. EINA
2. EINB
3. / EIRQ
4. / IRQ
5. FOE
6. FOUT
12. V
DD
3.6
2.4
11. CE1
10. CLK
9. DATA
1.2
M ax.
8. CE0
7. GND
2.8
VSOJ
−
12pin
Specifications (characteristics)
!
Recommended
Operating conditions
Item
Power voltage
Clock voltage
Operating
Temperature
Symbol
V
DD
V
CLK
T
OPR
Condition
−
−
−
Min.
1.6
1.3
−
40
Typ.
3.0
3.0
+25
Max.
5.5
5.5
+85
Unit
V
V
°
C
∗
Refer to application
!
Current consumption characteristics
Item
Symbol
Condition
CE0, CE1 = GND
/ IRQ, / EIRQ= OFF
I
BK
Current
Consumpti
on
I
32k
FOUT : output OFF
Event detection OFF
CE0, CE1 = GND
/ IRQ, / EIRQ= OFF
FOUT ; CL = 30 pF
32.768 kHz output ON
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
V
DD
=3 V
Min.
T
a
=
−40 °C ∼
+85
°C
Typ. Max. Unit
0.45
0.9
µ
A
0.35
0.7
!
Frequency characteristics
Item
Frequency
tolerance
Oscillation
Start-up time
Symbol
∆
f/f
Condition
T
a
= +25
°
C
V
DD
= 3.0 V
T
a
= +25
°
C
V
DD
= 1.6 V
T
a
=
−
40
°
C
∼
+85
°
C
V
DD
= 1.6 V
Rating
5
±
23
*
1 Max.
3 Max.
Unit
×
10
s
s
−
6
8.0
20.0
µ
A
t
STA
5.0
12.0
*Equivalent
to 1 minute of monthly deviation
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EPSONTOYOCOM [ EPSON TOYOCOM ]
