Real time clock module
Epson Toyocom
Low current consumption /
Small size, low profile model package
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RX - 8564 LC
•Built in frequency adjusted 32.768 kHz crystal unit.
•Interface Type
: I2C-Bus Interface (400 kHz)
•Operating voltage range
•Wide Timekeeper voltage range
•Low backup current
: 1.8 V to 5.5 V
: 1.0 V to 5.5 V / T
a = +25 °C
: 275 nA / 3.0 V(Typ.)
•32.768 kHz frequency output function: C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer, and
power supply voltage monitoring function.
Actual size
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
• Interface Type
• I2C hi-speed bus specifications. ( 400 kHz )
32.768 kHz
CRYSTAL
I2C-Bus slave address : read A3h and write A2h
00
Control 1
OSC
Voltage Detector
DIVIDER
Control 2
Seconds
• Low Timekeeper voltage
• 1.0 V to 5.5 V /
• 1.3 V to 5.5 V /
T
a
= +25 °C
Minutes
Ta = −40 °C to +85 °C
Hours
CLKOUT
CLKOE
OUTPUT
Days
CONTROL
• 32.768 kHz frequency output function
• CLKOUT pin output (C-MOS output ), CL=30 pF
• CLKOE pin enables output on/off control.
Weekdays
Month / Century
Years
• Output selectable <32.768 kHz, 1024 Hz, 32 Hz, 1 Hz>
Minutes Alarm
Hour Alarm
Day Alarm
Weekday Alarm
/ INT
CONTROL
LOGIC
• The various interrupt function
• Timer function can be set up between 1/4096 second and 255 minutes.
• Alarm function can be set to any combination of day of
week, hour, or minute.
I2C-BUS
SCL
SDA
INTERFACE
CLKOUT frequency
Timer Control
Timer
ADDRESS
REGISTER
Functions are compatible with RTC-8564 JE / NB series.
0F
POR
Pin Function
Terminal connection / External dimensions
(Unit:mm)
RX − 8564 LC
Signal Name
Input / Output
Function
SCL
SDA
Input
Serial clock input pin
1. N.C.
2. N.C.
3. N.C.
4. N.C.
12. N.C.
Bi-directional
Data input and output pin
11. CLKOE
32.768 kHz clock output pin with the output control function. (C-MOS)
CLKOE pin control the condition of CLKOUT pin with FE-bit, FD1-bit,
FD0-bit.
C L K O E p in
in p u t
CLKOUT
Output
DD
V
10.
9. CLKOUT
FE
b it
1
0
1
0
C L K O U T p in
o u tp ut
2.4
O utpu t
( C -M O S
)
H IG H
LO W
O FF
O FF
O FF
( LO W
( LO W
( LO W
)
)
)
CLKOE
/INT
Input
5.
SCL
SDA
/ INT
8.
7.
6. GND
2.8
Output
Interrupt output ( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
V
DD
VSOJ − 12pin
GND
Specifications (characteristics)
Refer to application manual for details.
!
!
Current consumption characteristics
Recommended Operating Conditions
Ta = -40 °C to +85 °C
Item
Symbol
Condition
SCL
= 0 Hz
Min. Typ. Max. Unit
Item
Symbol
Condition
Min.
Typ.
Max. Unit
DD
V
Power voltage
Clock voltage
Operating
1.8
3.0
3.0
5.5
5.5
V
V
DD
V
CLK
LOW
V
V
f
= 5 V
330 800
nA
CLKOE = GND
OPR
T
°
-40
+25
+85
C
BK
I
temperature
DD
V
CLKOUT ;
output OFF ( LOW )
= 3 V
275 700
!
Low voltage detection
Current
Consumption
Item
Symbol
Condition
Min.
Typ.
0.9
Max. Unit
DD
V
= 5 V
SCL
f
= 0 Hz
DD
2.5
1.5
3.4
2.2
CLKOE = V
a
°
= +25 C
T
1.0
V
Low voltage
detection
CLKOUT ;
32k
LOW
V
I
µA
a
°
°
°
0.9
0.9
1.2
1.3
V
V
T
T
= -20 C to +70 C
DD
V
32.768 kHz Output ON
(Output=OPEN ;
CL = 0 pF)
a
°
= -40 C to +85 C
= 3 V
!
Frequency characteristics
Item
Symbol
Condition
Rating
Unit
a
°
C
= 3.0 V
Frequency
tolerance
T
V
= +25
6
−
∆
±
×
10
f / f
5
23 *
DD
* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
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