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ES51999 Datasheet(PDF) 8 Page - Cyrustek corporation

Part No. ES51999
Description  4 3/4 and 5 3/4 A/D AUTO
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Maker  CYRUSTEK [Cyrustek corporation]
Homepage  http://www.cyrustek.com.tw
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ES51999 Datasheet(HTML) 8 Page - Cyrustek corporation

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07/07/06
8
ES51999
4 3/4 and 5 3/4 A/D AUTO
ZERO ‘H’ for zero calibration.
X10 ‘H’ for X10 function.
SLEEP ‘H’ for DMM in sleep mode.
mode 2: ES51999 sends the status and counts ( counter from DINT ) to uP.
t
0 is at least 5ms and t1 must be (32 ~ 512)T, where T = 0.25µs.
t
2 is the time from the rising edge of EOC to the last data been transferred. t2 is no
more than 4.9ms. That is, all results must be transferred within 4.9ms from the
rising edge of EOC.
The detail timing between SCLK and STATUS is as follow:
Serial Data Format (STATUS):
- Voltage (“000”), current (“010”), resistance (“100”) and diode (“101”)
measurement
SIGN
0
BATT
D0<0:19> (20 bits)
012
3 ~ 22
SIGN ‘H’ for negative; ‘L’ for positive. In AC,
Ω and diode measurement, this bit
can be ignored.
BATT ‘H’ for battery-low indication.
D0<0:19> Conversion results (magnitude). The format is binary code. LSB outputs
(32 ~ 512)T with 30 ~ 70% duty cycle
(VCC)
(V-)
STATUS
S
1
(VCC)
(V-)
SCLK
S
0
S
n-1
S
n
S
final
status & counts
EOC(O)
SCLK(I)
STATUS(O)
(VCC)
(V-)
(VCC)
(V-)
(VCC)
(V-)
t
1
one conversion period
t
0
t
2


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