REV. 1.2.2 26 4.1.3 Tx FIFO Data Loading at locations 0x100, 0x300, 0x500, 0x700 The TX F" />
參數(shù)資料
型號(hào)： XR17D154CV-0A-EVB
廠商： Exar Corporation
文件頁(yè)數(shù)： 19/69頁(yè)
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR17D154 144TQFP
標(biāo)準(zhǔn)包裝： 1
系列： *
XR17D154
xr
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
REV. 1.2.2
26
4.1.3
Tx FIFO Data Loading at locations 0x100, 0x300, 0x500, 0x700
The TX FIFO data (up to the maximum 64 bytes) can be loaded in a single burst 32-bit write operation
(maximum 16 DWORD writes) at memory locations 0x100 (channel 0), 0x300 (channel 1), 0x500 (channel 2),
and 0x700 (channel 3).
4.2
FIFO DATA LOADING AND UNLOADING THROUGH THE UART CHANNEL REGISTERS, THR
AND RHR IN 8-BIT FORMAT
The THR and RHR register address for channel 0 to channel 3 is shown in Table 9 below. The THR and RHR
for each channel 0 to 3 are located sequentially at address 0x0000, 0x0200, 0x0400 and 0x0600. Transmit
data byte is loaded to the THR when writing to that address and receive data is unloaded from the RHR
register when reading that address. Both THR and RHR registers are 16C550 compatible in 8-bit format, so
each bus operation can only write or read in bytes.
WRITE TX FIFO
BYTE 3
BYTE 2
BYTE 1
BYTE 0
Write n+0 to n+3
FIFO Data n+3
FIFO Data n+2
FIFO Data n+1
FIFO Data n+0
Write n+4 to n+7
FIFO Data n+7
FIFO Data n+6
FIFO Data n+5
FIFO Data n+4
Etc.
TABLE 9: TRANSMIT AND RECEIVE DATA REGISTER IN BYTE FORMAT, 16C550 COMPATIBLE
PCI Bus
Data Bit-31
B7 B6 B5 B4 B3 B2 B1 B0
Transmit Data Byte n+3
Transmit Data Byte n+2
Transmit Data Byte n+1
Transmit Data Byte n+0
PCI Bus
Data Bit-0
Channel 0 to 3 Transmit Data in 32-bit alignment through the Configuration Register Address
0x0100, 0x0300, 0x0500 and 0x0700
THR and RHR Address Locations For CH0 to CH3 (16C550 Compatible)
CH0 0x000 Write THR
CH0 0x000 Read RHR
CH1 0x200 Write THR
CH1 0x200 Read RHR
CH2 0x400 Write THR
CH2 0x400 Read RHR
CH3 0x600 Write THR
CH3 0x600 Read RHR
784THRRHR1
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
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參數(shù)描述
XR17D154CV-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
XR17D154CVTR-F 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 3.3V/5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17D154CVTR-F
XR17D154IV 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
XR17D154IV-F 功能描述:UART 接口集成電路 3.3V-5V 64B FIFO temp -45 to 85C;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
XR17D154IVTR-F 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 3.3V/5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17D154IVTR-F
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