TDA8029 Datasheet, PDF (6/59 Pages) NXP Semiconductors – Low power single card reader

Philips Semiconductors
TDA8029
Low power single card reader
Table 3: Pin description …continued
Symbol
Pin
Type Description
SAP
14
I/O
DC-to-DC converter capacitor connection (low ESR 220 nF
between SAP and SAM)
SBP
15
I/O
DC-to-DC converter capacitor connection (low ESR 220 nF
between SBP and SBM)
DCIN
16
I
power input for the DC-to-DC converter
SBM
17
I/O
DC-to-DC converter capacitor connection (low ESR 220 nF
between SBP and SBM)
PGND
18
power ground for the DC-to-DC converter
SAM
19
I/O
DC-to-DC converter capacitor connection (low ESR 220 nF
between SAP and SAM)
TEST
20
I
used for test purpose; connect to GND in the application
EA_N
21
I
control signal for microcontroller; connect to V_DD in the
application)
ALE
22
O
control signal for the microcontroller; leave open in the
application)
PSEN_N
23
O
control signal for the microcontroller; leave open in the
application)
P27
24
I/O
general purpose I/O
P26
25
I/O
general purpose I/O
XTAL1
26
I
external crystal connection or input for an external clock
signal
XTAL2
27
O
external crystal connection; leave open if an external clock is
applied to XTAL1
RESET
28
I
reset input from the host (active HIGH); no integrated
pull-down resistor
P32/INT0_N 29
O
interrupt output for test purpose; leave open in the
application
P33/INT1_N 30
I/O
external interrupt input, or general purpose I/O; may be left
open if not used
P31/TX
31
O
transmission line for serial communication with the host
P30/RX
32
I
reception line for serial communication with the host
8. Functional description
Throughout this specification, it is assumed that the reader is aware of ISO7816 norm
terminology.
8.1 Microcontroller
The embedded microcontroller is an 80C51FB with internal 16 kB ROM, 256 byte RAM
and 512 byte XRAM. It has the same instruction set as the 80C51.
The controller is clocked by the frequency present on XTAL1.
The controller may be reset by an active HIGH signal on pin RESET, but it is also reset by
the power-on reset signal generated by the voltage supervisor.
9397 750 14145
Product data sheet
Rev. 03 — 22 February 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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