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參數(shù)資料
| 型號： | XRT16C854 |
| 廠商： | Exar Corporation |
| 英文描述： | 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO |
| 中文描述： | 2.97V至5.5V四路UART的128字節(jié)FIFO |
| 文件頁數(shù)： | 36/54頁 |
| 文件大?。?/td> | 485K |
| 代理商： | XRT16C854 |
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XR16C854/854D
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
xr
REV. 3.0.1
36
EMSR[5:4]: Extended RTS Hysteresis
T
ABLE
15: A
UTO
RTS H
YSTERESIS
EMSR[7:6]: Reserved
4.12
FIFO Level Register (FLVL) - Read-Only
The FIFO Level Register replaces the Scratchpad Register (during a Read) when FCTR[6] = 1. Note that this
is not identical to the FIFO Data Count Register which can be accessed when LCR = 0xBF.
FLVL[7:0]: FIFO Level Register
This register provides the FIFO counter level for the RX FIFO or the TX FIFO or both depending on EMSR[1:0].
See Table 14
for details.
4.13
Baud Rate Generator Registers (DLL and DLM) - Read/Write
The concatenation of the contents of DLM and DLL gives the 16-bit divisor value which is used to calculate the
baud rate:
Baud Rate = (Clock Frequency / 16) / Divisor
See MCR bit-7 and the baud rate table also.
4.14
Device Identification Register (DVID) - Read Only
This register contains the device ID (0x14 for XR16C854). Prior to reading this register, DLL and DLM should
be set to 0x00.
4.15
Device Revision Register (DREV) - Read Only
This register contains the device revision information. For example, 0x01 means revision A. Prior to reading
this register, DLL and DLM should be set to 0x00.
4.16
Trigger Level (TRG) - Write-Only
User Programmable Transmit/Receive Trigger Level Register.
TRG[7:0]: Trigger Level Register
These bits are used to program desired trigger levels when trigger Table-D is selected. FCTR bit-7 selects
between programming the RX Trigger Level (a logic 0) and the TX Trigger Level (a logic 1).
EMSR
B
IT
-5
EMSR
B
IT
-4
FCTR
B
IT
-1
FCTR
B
IT
-0
RTS#
H
YSTERESIS
(C
HARACTERS
)
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
0
±4
±6
±8
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
±8
±16
±24
±32
1
1
1
1
0
0
0
0
0
0
1
1
0
1
0
1
±40
±44
±48
±52
1
1
1
1
1
1
1
1
0
0
1
1
0
1
0
1
±12
±20
±28
±36
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT16L2552 | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
| XRT3591 | SINGLECHIP V. 35 TRANSCEIVER |
| XRT3591B | SINGLECHIP V. 35 TRANSCEIVER |
| XRT3591BID | SINGLECHIP V. 35 TRANSCEIVER |
| XRT3591BIP | SINGLECHIP V. 35 TRANSCEIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT16L2552 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
| XRT2588CN | 制造商:Exar Corporation 功能描述: |
| XR-T2713CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Metering/Monitoring Circuit |
| XR-T3588 | 制造商:EXAR 制造商全稱:EXAR 功能描述:V.35 Interface Receiver/Transmitter |
| XR-T3588-89ES | 制造商:EXAR 制造商全稱:EXAR 功能描述:XR-T3588/89 Evaluation System |
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