参数资料
型号: RX-4571LC
厂商: EPSON TOYOCOM CORP
元件分类: 时钟/数据恢复及定时提取
英文描述: REAL TIME CLOCK, PDSO12
封装: ROHS COMPLIANT, VSOJ-12
文件页数: 2/33页
文件大小: 723K
代理商: RX-4571LC
RX
4571 LC
Page - 7
ETM18E-04
9. Matters that demand special attention on use
9.1. VDD and CE timing
* When the power is turned to ON, use with CE = " L " ( VCL[V] in the diagram ) as illustrated in the following
timing chart.
VDD
1.6 V
VCL
tCL
CE
Item
Symbol
Remark
Specification
Unit
CE voltage when power is
turned to ON
VCL
CE impressed voltage
until VDD = 1.6 V
0.3 (Max.)
V
CE=VCL[V] time when power
is turned to ON
tCL
Time to maintain CE=VCL[V]
until VDD = 1.6 V
30 ( Min. )
ms
9.2. Migrating to backup, and returning
* When migrating to backup, before switching the power source, make sure CE1 or CE0 is definitely LOW and
RTC is not selected
VDD
VCLK
CE
Back Up
tCD
tF
tR
tCU
VIL
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
CE time before power drop
tCD
0
μs
Power drop time
tF
2
μs / V
Power rise time
tR
5
μs / V
CE time after power rise
tCU
0
μs
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