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TDA8008 Arkusz danych(PDF) 6 Page - NXP Semiconductors |
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TDA8008 Arkusz danych(HTML) 6 Page - NXP Semiconductors |
6 / 12 page 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 |
Podobny numer części - TDA8008 |
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Podobny opis - TDA8008 |
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