參數(shù)資料
型號(hào): XR17D152CM
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
中文描述: 2 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP100
封裝: 14 X 14 MM, 1 MM HEIGHT, TQFP-100
文件頁數(shù): 40/68頁
文件大?。?/td> 772K
代理商: XR17D152CM
XR17D152
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
á
REV. 1.2.0
40
FCR[7:6]: Receive FIFO Trigger Select
(logic 0 = default, RX trigger level =1)
The FCTR Bits 6-7 are associated with these 2 bits. These 2 bits are used to set the trigger level for the receiv-
er FIFO interrupt.
Table 14
shows the complete selections. Note that the receiver and the transmitter cannot
use different trigger tables. Whichever selection is made last applies to both the RX and TX side.
T
ABLE
14: T
RANSMIT
AND
R
ECEIVE
FIFO T
RIGGER
L
EVEL
S
ELECTION
T
RIGGER
T
ABLE
FCTR
B
IT
-7
FCTR
B
IT
-6
FCR
B
IT
-7
FCR
B
IT
-6
FCR
B
IT
-5
FCR
BIT
-4
R
ECEIVE
T
RIGGER
L
EVEL
T
RANSMIT
T
RIGGER
L
EVEL
C
OMPATIBILITY
Table A
0
0
0
0
1
1
0
1
0
1
0
0
1 (default)
4
8
14
1 (default)
16C550, 16C2550,
16C2552, 16C554,
16C580 compati-
ble.
Table B
0
1
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
8
16
24
28
16
8
24
30
16C650A compati-
ble.
Table C
1
0
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
8
16
56
60
8
16
32
56
16C654 compati-
ble.
Table D
1
1
X
X
X
X
Programmable Programmable 16C850, 16C2850,
16C2852, 16C854,
16C864, 16L2750,
16L2751, 16L2752
compatible.
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