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參數(shù)資料
| 型號： | XR16L580 |
| 廠商： | Exar Corporation |
| 英文描述： | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| 中文描述： | 2.25V至5.5V的最小的16字節(jié)FIFO和省電的UART |
| 文件頁數(shù)： | 12/47頁 |
| 文件大?。?/td> | 285K |
| 代理商： | XR16L580 |
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XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
á
REV. 1.2.0
12
2.11
The receiver section contains an 8-bit Receive Shift Register (RSR) and 16 bytes of FIFO which includes a
byte-wide Receive Holding Register (RHR). The RSR uses the 16X clock for timing. On the falling edge of a
start or a false start bit, an internal receiver counter starts counting at the 16X clock rate. After 8 clocks the start
bit period should be at the center of the start bit. At this time the start bit is sampled and if it is still a logic 0 it is
validated as a start bit. Evaluating the start bit in this manner prevents the receiver from assembling a false
character. Each of the data, parity and stop bits is sampled at the middle of the bit to prevent false framing. If
there were any error(s), they are reported in the LSR register bits 2-4. Upon unloading the receive data byte
from RHR, the receive FIFO pointer is bumped and the error tags are immediately updated to reflect the status
of the data byte in RHR register. RHR can generate a receive data ready interrupt upon receiving a character
or delay until it reaches the FIFO trigger level. Furthermore, data delivery to the host is guaranteed by a
receive data ready time-out interrupt when data is not received for 4 word lengths as defined by LCR[1:0] plus
12 bits time. This is equivalent to 3.7-4.6 character times. The RHR interrupt is enabled by IER bit-0.
2.11.1
Receive Holding Register (RHR) - Read-Only
The Receive Holding Register is an 8-bit register that holds a receive data byte from the Receive Shift
Register. It provides the receive data interface to the host processor. The RHR register is part of the receive
FIFO of 16 bytes by 11-bits wide, the 3 extra bits are for the 3 error tags to be reported in LSR register. When
the FIFO is enabled by FCR bit-0, the RHR contains the first data character received by the FIFO. After the
RHR is read, the next character byte is loaded into the RHR and the errors associated with the current data
byte are immediately updated in the LSR bits 2-4.
RECEIVER
F
IGURE
8. T
RANSMITTER
O
PERATION
IN
FIFO
AND
F
LOW
C
ONTROL
M
ODE
Transmit Data Shift Register
(TSR)
Transmit
Data Byte
Transmit
FIFO
16X Clock
Auto CTS Flow Control (CTS# pin)
Auto Software Flow Control
Flow Control Characters
(Xoff1,2 and Xon1,2 Reg.)
TXFIFO1
THR Interrupt (ISR bit-1):
FIFO is Enabled by FCR bit-0=1
- When the TX FIFO falls below the
programmed Trigger Level, and
- When the TX FIFO becomes empty.
相關(guān)PDF資料 |
PDF描述 |
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| XR16L580IL | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L580IM | SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L651 | 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO(2.5V, 3.3V和5V 低功耗通用異步接收器/發(fā)送器（帶32字節(jié)先進先出）) |
| XR16L784 | HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16L580_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE |
| XR16L580IL | 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 |
| XR16L580IL-0A-EVB | 功能描述:UART 接口集成電路 Supports L580 32 pin 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 |
| XR16L580IL-0B-EVB | 功能描述:UART 接口集成電路 Supports L580 32 pin 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 |
| XR16L580IL24 | 功能描述:UART 接口集成電路 UART w/ POWER SAVE 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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