TL16C552AFNR Datasheet, PDF (17/38 Pages) Texas Instruments – DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C552A, TL16C552AM
DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH FIFO
SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999
PARAMETER MEASUREMENT INFORMATION
ENIRQ
ACK
INT2
50%
td13
50%
50%
td14
50%
Line Printer
Status Register,
Bit 2 (PRINT)
50%
td(int
(see Note A)
IOR
(RD_LPS)
50%
NOTE A: A timing value is not provided for td(int) in the tables because the line printer status register, bit 2 (PRINT) is an internal signal.
Figure 16. Parallel Port AT Mode Timing (ENIRQ = Low) Waveforms
ENIRQ
ACK
INT2
td15
50%
50%
td16
50%
PRINT
IOR
(RD_LPS)
50%
Figure 17. Parallel Port PS/2 Mode Timing (ENIRQ = High) Waveforms
RESET
50%
50%
tw3
Figure 18. RESET Voltage Waveform
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