RX6110SA Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI & I2C-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI & I²C-Bus)
Power Switching and Low current consumption
RX6110SA
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: SPI & I²C -Bus
Operating voltage range
: 1.6Vto5.5V
Wide Timekeeper voltage range : 1.1Vto5.5V
Low backup current
: 130nA/3V(Typ.)
Built-in user RAM
: 128bit(8bit16,SRAM)
Auto power switching functions : When VDD deteriorates
than 1.6V, internal source
is switched to VBAT.
The various functions include full calendar, alarm, timer.
Epson is prepared Linux driver for this product.
(http://www5.epsondevice.com/en/quartz/tech/linux_for_rtc/index.html)
Actual size
The registered trademark Linux® is used pursuant to a sublicense from LMI(Linux Mark Institute)
The I²C-Bus is a trademark of NXP Semiconductors
Product Number (Please contact us)
RX6110SA : X1B000232xxxx00
Block diagramç
( 32.768 kHz )
OSC
VDD
VIO
VBAT
/ IRQ1
/ IRQ2
ALARM, FOUT
TIMER, FOUT
SPISEL
CLK/SCL
DI / SDA
DO/FOUT
CE/FOE
DIVIDER
POWER
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
CLOCK
and
CALENDR
TIMER REGISTER
ALARM REGISTER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
USER RAM 128 bit
ç ç ç Overviewç
ç
•Interface type.
• SPI-Bus and I²C-Bus interface.
•By a terminal, a switchover of the interface is possible.
•Built-in auto power switching function
•When VDD deteriorates, internal source is switched to VBAT.
•Frequency output function
Output frequency can be selected as 32.768kHz, 1024Hz, 1Hz.
•Timer function
•Timer function can be set up between
1/4096 second and 65535 hours.
•Timing period are 1hour, 1min, 64Hz, 4096Hz.
•It is recorded automatic to TF-bit at the time of event occurrence,
and possible to output with /IRQ1 or /IRQ2 pin.
•Alarm function
•Alarm function can be set to day of week,
day, hour, and minute.
•It is recorded automatic to AF-bit at the time of event occurrence,
and possible to output with /IRQ1 pin output.
•User RAM
•128 bit (8 bit x 16, SRAM)
Pin Functionç
Signal Name Input/Output
SPISEL
Input
CE/FOE
Input
CLK/SCL
DI/SDA
Input
Input / Output
DO/FOUT
Output
/ IRQ1
/ IRQ2
VDD
VIO
VBAT
GND
Output
Output




Function
The interface select pin.
SPI is chosen at a "H" level (VIO voltage) / I²C is chosen at a "L" level (GND voltage).
SPI: Should be held high to allow access to the CPU.
Incorporates a pull-down resistor.
I²C: It is an input pin for controlling the DO/FOUT output. When the frequency output from a
DO/FOUT pin does not need, CE/FOE pin must be connected to GND.
This is a shift clock input pin for serial data transmission.
SPI: This is the data input pin for serial data transfer.
I²C: This is the data input/output pin for serial data transfer.
SPI: This is the data output pin for serial data transfer.
I²C: This is the C-MOS output pin with output control provided via the CE/FOE pin.
(frequency selection: 32.768 kHz / 1024 Hz / 1Hz / Hi-z)
This pin outputs interrupt signals ("L" level) for alarm, timer, time update, and FOUT.
This is an N-ch open-drain output. This pin can output even a backup mode.
This pin outputs interrupt signals ("L" level) for timer and FOUT. 
This is an C-MOS output. This pin becomes Hi-z in less than VDD=1.6V.
This is a power-supply pin. It can impress the voltage unlike VIO.
This pin is a power supply for input and the output and input / output pins.
Connected to a positive power supply.
Connect a secondary battery or capacitor for backup power supply.
If a backup power supply is not present, this pin connect to VDD
Connected to a ground.
ç ç ç Terminal connection/External dimensionsç
(Unit:mm)ç
RX6110SA
1. CLK/SCL
2. DI/SDA
3. DO/FOUT
4. CE/FOE
5.0
5. SPISEL
6. GND
14
.
N.C.
13
.
N.C.
12
.
/IRQ1
11
.
VIO
10
.
VDD
9. VBAT
7. /IRQ2
7.40.2
8. N.C.

SOP - 14 pin
The metal case inside of the molding compound may be exposed
on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality,
reliability or electrical specs.
Specifications (characteristics)
 Recommended Operating Conditions
Item
Symbol Conditions
Min.
Power voltage
VDD
-
1.6
Clock voltage
VCLK
-
1.1
Operating
temperature
TOPR
-
-40
 Frequency characteristics
Item
Frequency
tolerance
Oscillation
start-up time
Symbol
f/f
tSTA
Conditions
Ta=+25C
VDD=3.0V
Ta=+25C
VDD=1.6V
 Equivalent to 1 minute of monthly deviation (excluding offset.)
Typ. Max.
3.0 5.5
3.0 5.5
+25 +85
Rating
B: 523
1Max.
Unit
V
V
C
Unit
10^6
s
* Refer to application manual for details.
 Current consumption characteristics
Ta=-40Cto+85C
Item
Symbol
Conditions
Min. Typ. Max. Unit
Current
Consumption
VBAT = 3.0 V
Input pins are "L" ,VDD = 0 V
DO/FOUT=OFF, fCLK = 0 Hz,
IBK /IRQ1,2 = OFF, TSEL2=”1”
-
It include an OFF leak current of
SW between the power supply
(VBAT-VDD)
130 250 nA
VDD = 3.0 V
fCLK = 0 Hz, SPISEL=VIO,
I32k /IRQ1,2=OFF,CE/FOE=VIO,
DO/FOUT:32.768kHz ON,
CL=0pF
-  1.5 2.1 A