TDA8002 Philips Semiconductors, TDA8002 Datasheet - Page 12

• Manufacturer Part Number: TDA8002
• Description: IC card interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
D
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.
1997 Nov 04
handbook, full pagewidth
EACTIVATION SEQUENCE
IC card interface
OSC_INT/64
CMDVCC
RSTIN
V CC
VUP
RST
CLK
I/O
t 10
t 11
Fig.11 Deactivation sequence.
t 12
t 13
high - Z
t 14
12
t de
Figures 11 and 12 illustrate the deactivation sequence as
described below:
1. RST goes LOW (t
2. CLK is stopped (t
3. I/O, AUX1, AUX2 are outputs into high-impedance
4. V
5. VUP falls (t
state (t
ensures that I/O remains below V
slope of V
CC
falls to zero (t
13
= t
CC
15
11
= t
+ T)
11
12
11
14
+ 5T).
t 15
= t
= t
t
11
10
11
)
+
+ 1
1
2
1
T)
2
T); a special circuitry
Product specification
CC
MGE739
during falling
TDA8002