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TDA8002AT/3/C2 Datasheet(PDF) 12 Page - NXP Semiconductors

No. de pieza TDA8002AT/3/C2
Descripción Electrónicos  IC card interface
PDF  28 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8002AT/3/C2 Datasheet(HTML) 12 Page - NXP Semiconductors

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1997 Nov 04
12
Philips Semiconductors
Product specification
IC card interface
TDA8002
DEACTIVATION SEQUENCE
When a session is completed, the microcontroller sets the
CMDVCC line to HIGH state or MODE line to LOW state.
The circuit then executes an automatic deactivation
sequence by counting the sequencer down and ends in
idle mode.
Figures 11 and 12 illustrate the deactivation sequence as
described below:
1. RST goes LOW (t11 ≈ t10)
2. CLK is stopped (t12 =t11 + 1⁄2T)
3. I/O, AUX1, AUX2 are outputs into high-impedance
state (t13 =t11 +T)
4. VCC falls to zero (t14 =t11 +11⁄2T); a special circuitry
ensures that I/O remains below VCC during falling
slope of VCC
5. VUP falls (t15 =t11 + 5T).
Fig.11 Deactivation sequence.
handbook, full pagewidth
MGE739
CMDVCC
VUP
OSC_INT/64
VCC
I/O
CLK
RSTIN
RST
high - Z
tde
t10
t11
t12
t13
t14
t15



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