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參數(shù)資料
| 型號： | XR16L788 |
| 廠商： | Exar Corporation |
| 英文描述： | HIGH PERFORMANCE OCTAL UART |
| 中文描述： | 高性能八進制的UART |
| 文件頁數(shù)： | 13/42頁 |
| 文件大?。?/td> | 557K |
| 代理商： | XR16L788 |
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XR16L788 OCTAL UART
á
REV. 1.1.4
13
.
4.0
There are 8 UARTs [channel 7:0] in the 788. Each
has its own 64-byte of transmit and receive FIFO, a
set of 16550 compatible control and status registers,
and a baud rate generator for individual channel data
rate setting. Eight additional registers per UART were
added for the EXAR enhanced features.
4.1
P
ROGRAMMABLE
B
AUD
R
ATE
G
ENERATOR
Each UART has its own Baud Rate Generator (BRG)
with a prescaler for the transmitter and receiver. The
prescaler is controlled by a software bit in the MCR
UART
register. The MCR register bit-7 sets the prescaler to
divide the input crystal or external clock by 1 or 4. The
output of the prescaler clocks to the BRG. The BRG
further divides this clock by a programmable divisor
between 1 and (2
16
-1) to obtain a 16X or 8X sam-
pling clock of the serial data rate. The sampling clock
is used by the transmitter for data bit shifting and
re-
ceiver for data sampling. The BRG divisor (DLL and
DLM registers) defaults to a random value upon pow-
er up. Therefore, the BRG must be programmed dur-
ing initialization to the operating data rate.
T
ABLE
5: T
RANSMIT
AND
R
ECEIVE
D
ATA
R
EGISTER
, 16C550
COMPATIBLE
THR and RHR Address Locations For CH0 to CH7 (16C550 Compatible)
CH0 0x00 Write THR
CH0 0x00 Read RHR
CH1 0x10 Write THR
CH1 0x10 Read RHR
CH2 0x20 Write THR
CH2 0x20 Read RHR
CH3 0x30 Write THR
CH3 0x30 Read RHR
CH4 0x40 Write THR
CH4 0x40 Read RHR
CH5 0x50 Write THR
CH5 0x50 Read RHR
CH6 0x60 Write THR
CH6 0x60 Read RHR
CH7 0x70 Write THR
CH7 0x70 Read RHR
THRRHR1
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
相關PDF資料 |
PDF描述 |
|---|---|
| XR16L788CQ | HIGH PERFORMANCE OCTAL UART |
| XR16L788IQ | HIGH PERFORMANCE OCTAL UART |
| XR17C154 | Tip, Offset Tapered Needle, 1mm Diameter |
| XR17C154CV | Burner |
| XR17C154IV | Tools, Heatgun; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR16L788_05 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART |
| XR16L788_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART |
| XR16L788CQ | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART |
| XR16L788CQ-0A-EVB | 功能描述:UART 接口集成電路 Supports L788 100 ld QFP, 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 |
| XR16L788CQ-0B-EVB | 功能描述:界面開發(fā)工具 Supports L788 100 ld QFP, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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