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參數(shù)資料
| 型號： | XR16L2551 |
| 廠商： | Exar Corporation |
| 英文描述： | LOW VOLTAGE DUART WITH POWERSAVE |
| 中文描述： | 低壓杜阿爾特與省電 |
| 文件頁數(shù)： | 10/48頁 |
| 文件大?。?/td> | 287K |
| 代理商： | XR16L2551 |
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XR16L2551
LOW VOLTAGE DUART WITH POWERSAVE
á
REV. 1.0.0
10
2.6
The INTA and INTB interrupt output changes according to the operating mode and enhanced features setup.
Table 4
and
Table 5
summarize the operating behavior for the transmitter and receiver. Also see
Figure 20
through
Figure 25
.
INTA and INTB Outputs
2.7
The L2551 includes an on-chip oscillator (XTAL1 and XTAL2) to produce a clock for both UART sections in the
device. The CPU data bus does not require this clock for bus operation. The crystal oscillator provides a
system clock to the Baud Rate Generators (BRG) section found in each of the UART. XTAL1 is the input to the
oscillator or external clock buffer input with XTAL2 pin being the output. Please note that the input XTAL1 is not
5V tolerant and so the maximum at the pin should be VCC. For programming details, see “Programmable Baud
Rate Generator.”
Crystal Oscillator or External Clock Input
T
ABLE
3: TXRDY#
AND
RXRDY# O
UTPUTS
IN
FIFO
AND
DMA M
ODE
P
INS
FCR
BIT
-0=0
(FIFO D
ISABLED
)
FCR B
IT
-0=1 (FIFO E
NABLED
)
FCR Bit-3 = 0
(DMA Mode Disabled)
FCR Bit-3 = 1
(DMA Mode Enabled)
RXRDY# A/B
0 = 1 byte.
1 = no data.
0 = at least 1 byte in FIFO
1 = FIFO empty.
1 to 0 transition when FIFO reaches the trigger
level, or time-out occurs.
0 to 1 transition when FIFO empties.
TXRDY# A/B
0 = THR empty.
1 = byte in THR.
0 = FIFO empty.
1 = at least 1 byte in FIFO.
0 = FIFO has at least 1 empty location.
1 = FIFO is full.
T
ABLE
4: INTA
AND
INTB P
INS
O
PERATION
FOR
T
RANSMITTER
FCR B
IT
-0 = 0
(FIFO D
ISABLED
)
FCR B
IT
-0 = 1
(FIFO E
NABLED
)
INTA/B Pin
0 = a byte in THR
1 = THR empty
0 = at least 1 byte in FIFO
1 = FIFO empty
T
ABLE
5: INTA
AND
INTB P
IN
O
PERATION
F
OR
R
ECEIVER
FCR B
IT
-0 = 0
(FIFO D
ISABLED
)
FCR B
IT
-0 = 1
(FIFO E
NABLED
)
INTA/B Pin
0 = no data
1 = 1 byte
0 = FIFO below trigger level
1 = FIFO above trigger level
相關PDF資料 |
PDF描述 |
|---|---|
| XR16L2551IL | LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2551IM | LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2552IJ | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
| XR16L2552IM | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
| XR16L2552 | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR16L2551_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2551IL | 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR16L2551IL-0A-EB | 功能描述:UART 接口集成電路 Supports L2551 32pin QFN, ISA Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR16L2551IL-0B-EB | 功能描述:UART 接口集成電路 Supports L2551 32pin QFN, PCI Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR16L2551IL-F | 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
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