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TDA8008 Arkusz danych(PDF) 6 Page - NXP Semiconductors

Numer części TDA8008
Szczegółowy opis  Dual multiprotocol smart card coupler
Download  12 Pages
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Producent  PHILIPS [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8008 Arkusz danych(HTML) 6 Page - NXP Semiconductors

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1999 Dec 14
6
Philips Semiconductors
Objective specification
Dual multiprotocol smart card coupler
TDA8008
TEST
36
test pin (must be left open-circuit in the application)
IOAUX
37
input or output for an I/O line issued on an auxiliary smart card interface
CS
38
chip select input (active LOW)
RSTOUT
39
open-drain output for resetting external chips
n.c.
40
not connected
P30/RXD
41
8xC51 general purpose I/O port/serial input port
P31/TXD
42
8xC51 general purpose I/O port/serial output port
P32/INT0
43
8xC51 general purpose I/O port/external interrupt 0
P33/INT1
44
8xC51 general purpose I/O port/external interrupt 1
P34/T0
45
8xC51 general purpose I/O port/Timer 0 external input
P35/T1
46
8xC51 general purpose I/O port/Timer 1 external input
P36/WR
47
8xC51 general purpose I/O port/external data memory write strobe
P37/RD
48
8xC51 general purpose I/O port/external data memory read strobe
XTAL2
49
connection pin for an external crystal (output from the inverting oscillator amplifier)
XTAL1
50
connection pin for an external crystal, or input for an external clock signal (input to the
inverting oscillator amplifier and input to the internal clock generator circuits)
VDDD
51
digital supply voltage
GNDD
52
digital ground
P20/A8
53
8xC51 general purpose I/O port/address 8
P21/A9
54
8xC51 general purpose I/O port/address 9
P22/A10
55
8xC51 general purpose I/O port/address 10
P23/A11
56
8xC51 general purpose I/O port/address 11
P24/A12
57
8xC51 general purpose I/O port/address 12
n.c.
58
not connected
n.c.
59
not connected
P25/A13
60
8xC51 general purpose I/O port/address 13
P26/A14
61
8xC51 general purpose I/O port/address 14
P27/A15
62
8xC51 general purpose I/O port/address 15
PSEN
63
Program store enable output: this is the read strobe to the external program memory. When
executing code from the external program memory, PSEN is activated twice each machine
cycle, except that two PSEN activations are skipped during each access to external data
memory. PSEN is not activated during fetches from internal program memory.
ALE/PROG
64
Address latch enable/program pulse: this is the output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE pulses are emitted at
a constant rate of 1
6 of the oscillator frequency and can be used for external timing or
clocking. It should be noted that one ALE pulse is skipped during each access to external data
memory. This pin is also the program pulse input (PROG) during EPROM programming. ALE
can be disabled by setting bit SFR Auxiliary 0. With this bit set, ALE will be active only during
a MOVX instruction.
SYMBOL
PIN
DESCRIPTION


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