TL16PNP550A_08 Datasheet, PDF (9/40 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT WITH PLUG-AND-PLAY (PnP) AND AUTOFLOW CONTROL

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TL16PNP550A
ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH PLUGĆANDĆPLAY (PnP) AND AUTOFLOW CONTROL
SLLS190B − MARCH 1995 − REVISED MARCH 1996
enabling autoflow control and auto-CTS (continued)
SIN
RTS
Byte 14
Byte 15
Start Byte 16 Stop
RTS Released After the
First Data Bit of Byte 16
Start Byte 18 Stop
RD
(RD RBR)
NOTES: A. RTS is deasserted when the receiver receives the first data bit of the sixteenth byte. The receiver FIFO is full after finishing the
sixteenth byte.
B. RTS is asserted again when there is at least one byte of space available and no incoming byte is in processing or there is more than
one byte of space available.
C. When the receiver FIFO is full, the first receiver buffer register read reasserts RTS.
Figure 4. RTS Functional Timing Waveforms, Receiver FIFO Trigger Level = 14 Bytes
flow control and interrupt
When flow control is enabled, bit 0 (∆CTS) of the modem status register does not cause a modem status
interrupt. The ACE accommodates a 1-Mbaud serial rate (16-MHz input clock) so that a bit time is 1 µs, and
a typical character time is 10 µs (start bit, 8 data bits, and a stop bit).
The TL16PNP550A ACE includes a programmable, on-board, baud rate generator that divides a reference
clock input by 1 to (2¹⁶ −1) for producing a 16 × clock to drive the internal transmitter logic. Provisions are
included to use this 16 × clock to drive the receiver logic. The ACE includes complete modem control capability
and a processor interrupt system that may be software tailored to minimize the system overhead for handling
the communications link.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage range, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range at any input, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Output voltage range, V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Case temperature for 10 seconds, T_C: FN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to VSS.
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
Low-level input voltage, VIL
Operating free-air temperature, TA
MIN
4.75
2
− 0.5
0
NOM
5
MAX
5.25
VCC
0.8
70
UNIT
V
V
V
°C
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