TDA8002 Philips Semiconductors, TDA8002 Datasheet - Page 10

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TDA8002

Manufacturer Part Number
TDA8002
Description
IC card interface
Manufacturer
Philips Semiconductors
Datasheet

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Philips Semiconductors
A
From idle mode, the circuit enters the activation mode
when the microcontroller sets the CMDVCC line LOW or
sets the MODE line HIGH when the CMDVCC line is
already LOW. The internal circuitry is then activated, the
internal clock is activated and an activation sequence is
executed. When RST is enabled, it becomes the inverse of
RSTIN.
1997 Nov 04
handbook, full pagewidth
CTIVATION SEQUENCE
IC card interface
OSC_INT/64
CMDVCC
RSTIN
V CC
VUP
RST
CLK
I/O
t 0
t 1
Fig.8 Activation sequence using RSTIN and CMDVCC.
t 2
high - Z
t act
t 3
10
t 4
Figures 8 to 10 illustrate the activation sequence as
described below:
1. Step-up converter is started (t
2. V
3. I/O, AUX1, AUX2 are enabled and CLK is enabled
4. CLK is set by setting RSTIN to HIGH (t
5. RST is enabled (t
(t
remains below V
further action on CLK, but is only controlling RST.
3
CC
t 5
= t
rises from 0 to 5 V (t
1
+ 4T); a special circuitry ensures that I/O
CC
5
= t
during falling slope of V
1
+ 7T); after t
T = 25 s
2
= t
1
1
+ 1
Product specification
t
0
1
)
2
5
T)
, RSTIN has no
TDA8002
MGE736
4
)
CC

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