參數(shù)資料
型號(hào): R2033T-E2
廠商: RICOH COMPANY LTD
元件分類(lèi): XO, clock
英文描述: 3 wire interface Real-Time Clock ICs
中文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO10
封裝: 4 X 2.90 MM, 1 MM HEIGHT, TSSOP-10
文件頁(yè)數(shù): 36/50頁(yè)
文件大?。?/td> 542K
代理商: R2033T-E2
R2033K/T
36
32768Hz Oscillation
Power-on reset flag
(PON)
Oscillation halt
sensing flag (XST)
Threshold voltage (1.6v or 1.3v)
VDD
Supply voltage
monitor flag (VDET)
Internal initialization
period (1 to 2 sec.)
VDET
0
XST
1
PON
0
VDET
0
XST
1
PON
1
VDET
0
XST
1
PON
0
Internal initialization
period (1 to 2 sec.)
When the PON bit is set to 1 in the control register 2, the DEV, F6 to F0, WALE, DALE, 12 /24, CLEN2 , TEST,
CT2, CT1, CT0, VDSL, VDET, CLEN1 , CTFG, WAFG, and DAFG bits are reset to 0 in the oscillation
adjustment register, the control register 1, and the control register 2. The PON bit is also set to 1 at power-on
from 0v.
< Considerations in Using Oscillation Halt Sensing Circuit >
Be sure to prevent the oscillation halt sensing circuit from malfunctioning by preventing the following:
1) Instantaneous power-down on the VDD
2) Condensation on the crystal oscillator
3) On-board noise to the crystal oscillator
4) Applying to individual pins voltage exceeding their respective maximum ratings
In particular, note that the
XST
bit may fail to be set to 0 in the presence of any applied supply voltage as
illustrated below in such events as backup battery installation. Further, give special considerations to prevent
excessive chattering in the oscillation halt sensing circuit.
VDD
相關(guān)PDF資料
PDF描述
R2033K 3 wire interface Real-Time Clock ICs
R2033K-E2 3 wire interface Real-Time Clock ICs
R2033T 3 wire interface Real-Time Clock ICs
R2043T 4-wire Serial Interface
R2043T-E2 4-wire Serial Interface
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