- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16514 > XR17D152CM-0A-EVB (Exar Corporation)EVAL BOARD FOR XR17D152 100TQFP PDF資料下載
參數(shù)資料
| 型號： | XR17D152CM-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 16/68頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR17D152 100TQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
á
XR17D152
REV. 1.2.0
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
23
4.0
TRANSMIT AND RECEIVE DATA
There are two methods to load transmit data and unload receive data from each UART channel. First, there is
a transmit data register and receive data register for each UART channel in the device configuration register set
to ease programming. These registers support 8, 16, 24 and 32 bits wide format. In the 32-bit format, it
increases the data transfer rate on the PCI bus. Additionally, a special register location provides receive data
byte with its associated error tags. This is a 16-bit or 32-bit read operation where the Line Status Register
(LSR) content in the UART channel register is paired along with the data byte. This operation further facilitates
data unloading with the error tags without having to read the LSR register separately. Furthermore, the
XR17D152 supports PCI burst mode for read/write operation of up to 64 bytes of data.
The second method is through each UART channel’s transmit holding register (THR) and receive holding
register (RHR). The THR and RHR registers are 16550 compatible so their access is limited to 8-bit format.
The software driver must separately read the LSR content for the associated error tags before reading the data
byte.
4.1
DATA LOADING AND UNLOADING VIA 32-BIT PCI BURST TRANSFERS
The XR17D152 supports PCI Burst Read and PCI Burst Write transactions anywhere in the mapped memory
region (except reserved areas). In addition, to utilize this feature fully, the device provides a separate memory
location (apart from the 16550 register set) where the RX and the TX FIFO can be read from/written to, as
shown in Table 2 on page 12. The following is an extract from the table showing the burstable memory
locations:
Channel 0:
RX FIFO
:
0x100 - 0x13F (64 bytes)
TX FIFO
:
0x100 - 0x13F (64 bytes)
RX FIFO + status
:
0x180 - 0x1FF (64 bytes data + 64 bytes status)
Channel 1:
RX FIFO
:
0x300 - 0x33F (64 bytes)
TX FIFO
:
0x300 - 0x33F (64 bytes)
RX FIFO + status
:
0x380 - 0x3FF (64 bytes data + 64 bytes status)
4.1.1
Normal Rx FIFO Data Unloading at locations 0x100 (channel 0) and 0x300 (channel 1)
The RX FIFO data (up to the maximum 64 bytes) can be read out in a single burst 32-bit read operation
(maximum 16 DWORD reads) at memory locations 0x100 (channel 0) and 0x300 (channel 1). This operation is
at least 16 times faster than reading the data in 64 separate 8-bit memory reads of RHR register (0x000 for
channel 0 and 0x200 for channel 1).
READ RX FIFO,
WITH NO ERRORS
BYTE 3
BYTE 2BYTE 1BYTE 0
Read n+0 to n+3
FIFO Data n+3
FIFO Data n+2
FIFO Data n+1
FIFO Data n+0
Read n+4 to n+7
FIFO Data n+7
FIFO Data n+6
FIFO Data n+5
FIFO Data n+4
Etc.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CB2012T100MR | INDUCTOR POWER 10UH 0805 |
| RBC26DRXH | CONN EDGECARD 52POS DIP .100 SLD |
| 6374612-4 | C/A 50/125 MM SC-LC 4M |
| GBM36DCSH-S288 | CONN EDGECARD 72POS .156 EXTEND |
| EMC06DRAS | CONN EDGECARD 12POS R/A .100 SLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR17D152CM-F | 功能描述:UART 接口集成電路 3.3V-5V 64B FIFO temp 0C to 70C; 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 |
| XR17D152CMTR-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 |
| XR17D152IM | 制造商:EXAR 制造商全稱:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152IM-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 |
| XR17D154 | 制造商:EXAR 制造商全稱:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。