參數(shù)資料
型號: XR16L784IV
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
中文描述: 4 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, LQFP-64
文件頁數(shù): 37/52頁
文件大小: 625K
代理商: XR16L784IV
á
REV. 1.2.0
XR16L784
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
37
FCTR[4]: Infrared RX Input Logic Select
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.
FCTR[5]: Auto RS485 Enable
Auto RS485 half duplex control enable/disable.
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.
T
ABLE
17: 16 S
ELECTABLE
H
YSTERESIS
L
EVELS
W
HEN
T
RIGGER
T
ABLE
-D
IS
S
ELECTED
FCTR B
IT
-3
FCTR B
IT
-2
FCTR B
IT
-1
FCTR B
IT
-0
RTS/DTR H
YSTERESIS
(
CHARACTERS
)
0
0
0
0
0
0
0
0
1
+/- 4
0
0
1
0
+/- 6
0
0
1
1
+/- 8
0
1
0
0
+/- 8
0
1
0
1
+/- 16
0
1
1
0
+/- 24
0
1
1
1
+/- 32
1
1
0
0
+/- 12
1
1
0
1
+/- 20
1
1
1
0
+/- 28
1
1
1
1
+/- 36
1
0
0
0
+/- 40
1
0
0
1
+/- 44
1
0
1
0
+/- 48
1
0
1
1
+/- 52
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