tda8026 NXP Semiconductors, tda8026 Datasheet - Page 34

• Manufacturer Part Number: tda8026
• Description: Multiple Smart Card Slot Interface Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8026_1
Product data sheet
8.8.3 Deactivation sequence
In
converter remains active.
When the session finishes, the microcontroller resets the START bit to logic 0
and the following deactivation sequence is performed:
Thus,
The deactivation time t
from the moment START bit is reset.
Fig 10. The card slot activation sequence
•
•
•
•
•
•
•
Figure 10
Card reset: RST
Pin CLK
Pin I/O
Pin V
The DC-to-DC converter is stopped.
Pins CLK
attached to pin GNDS (t
The internal oscillator switches to its low frequency (t
internal DC-to-DC
converter enable
t
11
internal clock
CC(n)
=
oscillator
(n)
START
RST
CLK
V
(n)
0
only one card slot is activated. If another card slot is active, the DC-to-DC
I/O
CC(n)
(n)
falls to 0 V (t
,
falls to 0 V with a controlled slew rate (t
is stopped (t
(n)
(n)
(n)
, RST
t
All information provided in this document is subject to legal disclaimers.
12
low frequency
=
(n)
t
(n)
11
deact
pin falls to 0 V (t
, V
+
Rev. 1 — 9 March 2010
T
---
2
13
CC(n)
is the time that V
12
,
t
0
).
15
1
t
).
13
).
1
and I/O
=
2
t
11
t
3
2
+
(n)
4
T
11
,
).
are driven to 0 V with a low-impedance switch
5
t
14
CC(n)
6
=
t
7
3
t
11
needs to be driven below 0.4 V, counting
high frequency
t
8
4
+
Multiple smart card slot interface IC
9 10 11 12 13 14
3T
------ -
2
14
).
and
15
)
t
15
=
t
11
+
TDA8026
© NXP B.V. 2010. All rights reserved.
7T
------ -
2
.
(Figure
001aal096
T/2
34 of 59
11)