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TDA8002 数据表(PDF) 10 Page - NXP Semiconductors

部件名 TDA8002
功能描述  IC card interface
Download  28 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

TDA8002 数据表(HTML) 10 Page - NXP Semiconductors

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1997 Nov 04
10
Philips Semiconductors
Product specification
IC card interface
TDA8002
ACTIVATION SEQUENCE
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.
Figures 8 to 10 illustrate the activation sequence as
described below:
1. Step-up converter is started (t1 ≈ t0)
2. VCC rises from 0 to 5 V (t2 =t1 +112T)
3. I/O, AUX1, AUX2 are enabled and CLK is enabled
(t3 =t1 + 4T); a special circuitry ensures that I/O
remains below VCC during falling slope of VCC
4. CLK is set by setting RSTIN to HIGH (t4)
5. RST is enabled (t5 =t1 + 7T); after t5, RSTIN has no
further action on CLK, but is only controlling RST.
Fig.8 Activation sequence using RSTIN and CMDVCC.
handbook, full pagewidth
MGE736
OSC_INT/64
CMDVCC
VUP
VCC
I/O
CLK
RSTIN
RST
high - Z
tact
t0
t1
t2
t3
t4
t5
T = 25
µs


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