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ES51999 Datasheet(PDF) 5 Page - Cyrustek corporation

Part No. ES51999
Description  4 3/4 and 5 3/4 A/D AUTO
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Manufacturer  CYRUSTEK [Cyrustek corporation]
Direct Link  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES51999 Datasheet(HTML) 5 Page - Cyrustek corporation

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07/07/06
5
ES51999
4 3/4 and 5 3/4 A/D AUTO
Operation `Mode
(1) Digital Interface between ES51999 and Microprocessor
The EOC, SCLK and STATUS of the ES51999 are used as digital communicating
interface between ES51999 and microprocessor. The STATUS pin is bi-directional, and
the others are unilateral: EOC is from ES51999 to microprocessor and SCLK is from
microprocessor to ES51999. The timing and data of the communication are as follows:
mode 1: ES51999 receives controlled status from microprocessor.
Timing of the above figure:
(T = 0.25
µs)
t
1
(1040 ~ 4096) T
t
6
(32 ~ 512) T
t
2
512 T
t
7
(520 ~ 1020) T
t
3
(4 ~ 256) T
t
8
(0 ~ 256) T
t
4
> 4 T
t
9
520 T
t
5
(16 ~ 1024) T
Note: 1. At START:
After time A, ES51999 enter into AZ phase. And at the same time, STATUS is
changed from output pin to input pin with a 3uA pull low current provided by
ES51999 internally. Then microprocessor can send control status to STATUS. It
is suggested that micro-processor begins to drive STATUS between B and C.
2. At END:
The microprocessor stopped driving STATUS between D and E, and ES51999
will begin to drive STATUS after F.
END
Force A/D entering into AZ phase
C
A
B
D
F
E
status
SCLK(I)
STATUS(I/O)
(VCC)
(V-)
(VCC)
(V-)
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
5
t
8
t
9
START


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