tda8025hn NXP Semiconductors, tda8025hn Datasheet - Page 16

• Manufacturer Part Number: tda8025hn
• Description: Ic Card Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8025_1
Product data sheet
Calculation of the time delays is as follows:
Remark: The value of period T is 64 times the period interval of the internal oscillator (i.e.
frequency of the defined f
The CLK is applied to the card under control of pin RSTIN in exactly the same way as with
the crystal oscillator.
Remark: Do not perform activation with pin RSTIN permanently pulled HIGH.
4. pins I/O, AUX1 and AUX2 are enabled (t3)
5. CLK is applied to the C3 contact (t4)
6. pin RST is enabled (t5)
25 s). t3 is called t
Fig 10. Activation sequence: CLK controlled by pin RSTIN with an external clock
•
•
•
•
•
CMDVCCN
XTAL1
V
I/O
CLK
RSTIN
RST
I/OUC
OSCINT
t1 = t0 + 2.13 ms
t2 = t1 = 3T/2 + 3(
t3 = t1 + 5T/2
t4 = driven by the host controller; > t3 and < t5
t5 = t1 + 11T/2
CC
connected to pin XTAL1
low frequency
t0
d(start)
t1 = t2
1
fosc(int)low
Rev. 01 — 6 April 2009
osc(int)
and t5 is called t
t
d(start)
parameter.
)
t4
t
d(end)
d(end)
= t
act
. f
high frequency
osc(int)low
is the low (or inactive mode)
TDA8025
© NXP B.V. 2009. All rights reserved.
IC card interface
ATR
001aai967
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