Transcript
Real time clock module
Epson Toyocom Product Number (Please contact us) X1B000082xxxx00
Built-in EVENT RECORDER FUNCTION SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX - 5412 SF •Built in frequency adjusted 32.768 kHz crystal unit. •Interface Type : 4-wire serial interface •Operating voltage range : 2.5 V to 5.5 V •Wide Timekeeper voltage range : 1.4 V to 5.5 V •Low backup current : 0.5 μA / 3 V ( Typ. ) •Built-in SRAM : Built-in 2048 bit ( 8 bit × 256 ) •The various functions include full calendar, alarm, timer, event record, watch dog timer, automatic power switching function.
Actual size
Block diagram
Overview
:I/O(VDD Voltage Operation)
• Event recorder function
:I/O(VDD&VBK Voltage Operation)
• 4 input ports are available for event recorder request. • Event recorder data are recorded in inside memory according to user setting.
32.768 kHz Internal VDD VDD VBK
• Power switching circuit
OSC
Switching Circuit
• When VDD voltage are down, real time clock module power source are switched to VBAT from VDD.
Clock and Divider
Calendar
Digital Trimming
Timer Register
Voltage Detector
Interrupts & Reset Controller
/R-IRQ
• Available built in SRAM for users memory and event recorder memory.
Alarm Register
DI
• Watch dog timer function • Watch dog time, it can set from 1.95 ms to 468.75 ms
Control Register and System Controller
Bus
DO
• Built-in SRAM (256 bytes)
Interface CLK Circuit CE
• Voltage drop detection • When real time clock module return from backup mode, this function indicate The reliability of real time clock module data.
RAM 2 k bit ( 8 x 256 ) 4 Event Input Detector
EVENT0~3
• Periodic timer function
Event Record Register
• In a timer period, it can set from 1/4096 seconds to 4095 minutes.
2 /S-IRQ0,1
Interrupts Controller
/WDO
• Alarm function
Watch Dog Register
WDI
• Alarm by combination of day of week, day, hours, and minutes.
Pin Function
External dimensions
Pin No.
I/O
VSS EVENT0 EVENT1 VBK EVENT2 (VSS)
1 2 3 4 5 6
Input Input Input -
GND Event input Event input Backup power supply Event input
EVENT3
7
Input
CE
8
Input
CLK
9
Input
DO
10
Output
DI
11
Input
/R-IRQ
12
Output
Function
Signal Pin name No.
I/O
(VSS) (VSS) (VSS) (VSS) (VSS) (VSS)
24 23 22 21 20 19
-
Event input
/S-IRQ1
18
Output
Chip enabled input
/S-IRQ0
17
Output
Clock input pin for serial data transmission Data output pin for serial data transmission Data input pin for serial data transmission RTC function interrupt output (open drain)
10.2 ± 0.3
Function
#24
R5412 5.4
E M12 3A Event record interrupt output (open drain) Event record interrupt output (open drain) Watch dog input (open drain) Watch dog output (open drain)
WDI
16
Input
/WDO
15
Output
N.C.
14
-
-
VDD
13
-
Power supply
0.5 #1
Current Consumption
#12
0.15
2.0 Max. 0 Min. 0.8
Specifications (characteristics) Electrical Characteristics Item Symbol Power voltage VDD Clock voltage VCLK Operating temperature TOPR Frequency tolerance Δf/f
0° - 10°
#13
7.8 ± 0.3
Signal name
(Unit:mm)
0.36
*Refer to application manual for details. Condition − − −
Min. 2.5 1.4 −40
Ta = +25 °C, VDD = 3.0 V
IDD1 Back up operation , CE = GND , /IRQ = OFF IDD2 *Equivalent to 1 minute of monthly deviation.
VBK=5 V VBK=3 V
http://www.epsontoyocom.co.jp
Typ. 3.0 3.0 +25 5 ± 23 * 0.5 0.5
Max. 5.5 5.5 +85 1.0 1.0
Unit V V
°C × 10−6 µA
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Epson: RX-5412SF:B3
