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ST8034P Scheda tecnica(PDF) 26 Page - STMicroelectronics

Il numero della parte ST8034P
Spiegazioni elettronici  16-pin smartcard interfaces
PDF  39 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST8034P Scheda tecnica(HTML) 26 Page - STMicroelectronics

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ST8034T, ST8034AT, ST8034P, ST8034C
Functional description
6.6
Activation sequence
The following device activation sequence is applied when using an external clock, see also
Figure 12.
1.
CMDVCC is pulled low (t0).
2.
The internal oscillator is triggered (t0).
3.
The internal oscillator changes to high frequency (t1).
4.
VCC rises from 0 V to 3 V or to 5 V (or to 1.8 V in the case of ST8034P) on
a controlled slope (t2).
5.
I/O is driven high (t3).
6.
The clock on the CLK output is applied to the C3 contact (t4).
7.
RST is enabled (t5).
Time delays
t1 = t0 + 384 × 1/fOSC(INT)LOW
t2 = t1
t3 (tD(START)) = t1 + 17T/2
t4 = driven by host microcontroller, t5 > t4 > t3
t5 (tD(END)) = t1 + 23T/2.
T = 64 x 1/fOSC(INT)
Figure 12. Activation sequence



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