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參數(shù)資料
| 型號： | ST16C1551IJ28 |
| 廠商： | EXAR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| 中文描述： | 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 11/37頁 |
| 文件大?。?/td> | 428K |
| 代理商： | ST16C1551IJ28 |
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REV. 4.2.0
ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
11
2.5.3
The host may fill the transmit FIFO with up to 16 bytes of transmit data. The THR empty flag (LSR bit-5) is set
whenever the FIFO is empty. The THR empty flag can generate a transmit empty interrupt (ISR bit-1) when the
amount of data in the FIFO falls below its programmed trigger level. The transmit empty interrupt is enabled by
IER bit-1. The TSR flag (LSR bit-6) is set when TSR/FIFO becomes empty.
2.6
Receiver
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. It verifies and validates
every bit on the incoming character in the middle of each data bit. On the falling edge of a start or 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. Evaluating
the start bit in this manner prevents the receiver from assembling a false character. The rest of the data bits
and stop bits are sampled and validated in this same manner 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.
2.6.1
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.
Transmitter Operation in FIFO Mode
F
IGURE
5. T
RANSMITTER
O
PERATION
IN
NON
-FIFO M
ODE
Transmit
Holding
Register
(THR)
Transmit Shift Register (TSR)
Data
Byte
L
S
B
M
S
B
THR Interrupt (ISR bit-1)
Enabled by IER bit-1
TXNOFIFO1
16X Clock
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST16C1551IP28 | 2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551IQ48 | 2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C2450 | 2.97V TO 5.5V DUART |
| ST16C2450CJ44 | 2.97V TO 5.5V DUART |
| ST16C2450CP40 | 2.97V TO 5.5V DUART |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C1551IJ28-F | 功能描述:UART 接口集成電路 UART W/16BYTE FIFO 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 |
| ST16C1551IJ28TR-F | 制造商:Exar Corporation 功能描述:UART 1-CH 16Byte FIFO 3.3V/5V 28-Pin PLCC T/R 制造商:Exar Corporation 功能描述:ST16C1551IJ28TR-F |
| ST16C1551IP28 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551IQ48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551IQ48-F | 功能描述:UART 接口集成電路 UART W/16BYTE FIFO 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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