tda8007bhl/c3 NXP Semiconductors, tda8007bhl/c3 Datasheet - Page 33

• Manufacturer Part Number: tda8007bhl/c3
• Description: Double Multiprotocol Ic Card Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.7
When the session is completed, the microcontroller resets
bit START at t
deactivation sequence (see Fig.15):
1. The card is reset by signal RST = LOW (t
2. Clock pulse CLK is stopped (t
3. Pins I/O, C4 and C8 fall to 0 V (t
4. Pin V
5. The step-up converter is stopped (t
2003 Feb 18
handbook, full pagewidth
Double multiprotocol IC card interface
rate (t
RST, V
if both cards are inactive.
Deactivation sequence
CC
14
CC
).
falls to 0 V with typical 0.17 V/ s slew
10
and I/O become low-impedance to ground,
. The circuit then executes an automatic
START
V CC
V UP
RST
CLK
I/O
t 10
t 11
12
).
13
).
15
) and pins CLK,
t 12
Fig.15 Deactivation sequence.
11
t de
).
t 13
t 14
33
Thus:
t
t
t
t
t
t
11
12
13
14
15
de
= t
= t
= t
= t
= t
= time that V
t 15
10
11
11
11
11
+
+
+ t
+
+
1
1
3
7
64
2
2
2
t
t
t
t
CC
needs to decrease to less than 0.4 V.
FCE685
Product specification
TDA8007B