Datasheet

TDA8025_1 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 01 — 6 April 2009 4 of 38
NXP Semiconductors
TDA8025
IC card interface
6. Block diagram
(1) Optional external resistor bridge. If this bridge is not needed, connect pin PORADJ to V
DD(INTF)
.
Fig 1. Block diagram
001aai957
10 µF
100 nF
100 nF
220 nF
470 nF
220 nF
10 µF
INTERNAL
OSCILLATOR
THERMAL
PROTECTION
OSCILLATOR
(V
DD(INTREGD)
)
RESET
GENERATOR
V
CC
LOOP
CLOCK
GENERATOR
I/O
TRANSCEIVER
I/O
TRANSCEIVER
I/O
TRANSCEIVER
CLOCK
CIRCUIT
INTERFACE
MULTIPLEXER
C5 C1
C6 C2
C7 C3
C8 C4
SEQUENCER
REGULATOR TEST
SUPPLY
INTERNAL
REFERENCE
VOLTAGE
SENSE
211620
GND CONFIG
V
DDI(REG)
3
TEST2
EN1
ALARMN
PRES
10
PORADJ 25
PRESN
9
RSTIN
22
CMDVCCN
1
OFFN
23
CLKDIV1
6
CLKDIV2
5
ENCLKIN
26
VCC_SEL1
7
CLKUP
EN4
VCC_SEL2
8
42728
V
DD(INTREGD)
XTAL2
31
AUX2UC
30
AUX1UC
29
I/OUC
XTAL1
V
DD(INTF)
EN3
EN2
CLK
XTAL
PVCC
2
TEST1
32
24
I/O
11
CLK
15
RST
17
CGND
14
V
CC
18
AUX1
13
AUX2
12
19
TEST4
TEST3
V
DD(INTREGD)
Level shifter
(V
DD(INTF)
)
R2
R1
V
DD(INTF)
(1)
TDA8025