XR16L78464-TQFP EXAR [Exar Corporation], XR16L78464-TQFP Datasheet - Page 37

• Manufacturer Part Number: XR16L78464-TQFP
• Description: HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
• Manufacturer: EXAR [Exar Corporation]

áç
áç
áç
áç
REV. 1.2.0
FCTR[4]: Infrared RX Input Logic Select
FCTR[5]: Auto RS485 Enable
Auto RS485 half duplex control enable/disable.
Logic 0 = Select RX input as active high encoded IrDA data, normal, (default).
Logic 1 = Select RX input as active low encoded IrDA data, inverted.
Logic 0 = Standard ST16C550 mode. Transmitter generates an interrupt when transmit holding register
(THR) becomes empty. Transmit Shift Register (TSR) may still be shifting data bit out.
Logic 1 = Enable Auto RS485 half duplex direction control. RTS# output changes its logic level from HIGH to
LOW when finished sending the last stop bit of the last character out of the TSR register. It changes from
LOW to HIGH when a data byte is loaded into the THR or transmit FIFO. The change to HIGH occurs prior
sending the start-bit. It also changes the transmitter interrupt from transmit holding to transmit shift register
(TSR) empty.
FCTR B
T
ABLE
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
IT
-3
17: 16 S
FCTR B
ELECTABLE
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
IT
-2
H
YSTERESIS
FCTR B
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
L
IT
EVELS
37
-1
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
W
HEN
FCTR B
T
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
RIGGER
IT
-0
T
ABLE
RTS/DTR H
-D
(
IS
CHARACTERS
S
+/- 16
+/- 24
+/- 32
+/- 12
+/- 20
+/- 28
+/- 36
+/- 40
+/- 44
+/- 48
+/- 52
ELECTED
+/- 4
+/- 6
+/- 8
+/- 8
0
YSTERESIS
)
XR16L784