參數(shù)資料
型號： XR-1790
英文描述： Audio Schematic
中文描述： 音頻示意圖
文件頁數(shù)： 7/58頁
文件大?。?/td> 676K
代理商： XR-1790
XR17L154
3.3V PCI BUS QUAD UART
REV. 1.0.0
á
7
1.0
XR17L154 REGISTERS
The XR17L154 UART has three different sets of registers as shown in
Figure 3
. The PCI local bus
configuration space registers are for plug-and-play auto-configuration when connecting the device to the PCI
bus. This auto-configuration feature makes installation very easy into a PCI system and it is part of the PCI
local bus specification. The second register set is the device configuration registers that are accessible directly
from the PCI bus for programming general operating conditions of the device and monitoring the status of
various functions. These registers are mapped into 2K of the PCI bus memory address space. These functions
include all 4 channel UART’s interrupt control and status, 16-bit general purpose timer control and status,
multipurpose inputs/outputs control and status, sleep mode, soft-reset, and device identification and revision.
And lastly, each UART channel has its own set of 5G internal UART configuration registers for its own operation
control and status reporting. All 4 sets of channel registers are embedded inside the device configuration
registers space, which provides faster access. The following paragraphs describe all 3 sets of registers in
detail.
1.1
The PCI local bus configuration space registers are responsible for setting up the device’s operating
environment in the PCI local bus. The pre-defined operating parameters of the device are read by the PCI bus
plug-and-play auto-configuration manager in the operating system. After the PCI bus has collected all data
from every device/card on the bus, it defines and downloads the memory mapping information to each device/
card about their individual operation memory address location and conditions. The operating memory mapped
address location is downloaded into the Base Address Register (BAR) register, 0x10. The plug-and-play auto
configuration feature is only available when an external 93C46 EEPROM is used. The EEPROM contains the
device vendor and sub-vendor data required by the auto-configuration setup.
PCI LOCAL BUS CONFIGURATION SPACE REGISTERS
F
IGURE
3. T
HE
XR17L154 R
EGISTER
S
ETS
Channel 0
INT, MPIO,
TIMER, REG
Device Configuration and
UART[3:0] Configuration
Registers are mapped on
to the Base Address
Register (BAR) in a 2K-
byte of memory address
space
PCI Local Bus
Target
Interface
Channel 0
Channel 1
Channel 2
Channel 3
Device Configuration Registers
4 channel Interrupts,
Multipurpose I/Os,
16-bit Timer/Counter,
Sleep, Reset, DVID, DREV
UART[3:0] Configuration
Registers
16550 Compatible and EXAR
Enhanced Registers
PCI Local Bus
Configuration Space
Registers for Plug-
and-Play Auto
Configuration
PCIREGS-1
Vendor and Sub-vendor ID
and Product Model Number
in External EEPROM
0x0000
0x0200
0x0400
0x0600
0x0080
0x07FF
0x0100
相關(guān)PDF資料
PDF描述
XR17L154CV Telecomm/Datacomm
XR17L154IV Telecomm/Datacomm
XR-2011CN Septuple Peripheral Driver
XR-2012CN Septuple Peripheral Driver
XR-2013CN Septuple Peripheral Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17C152 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS DUAL UART
XR17C152CM 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS DUAL UART
XR17C152CM-0A-EVB 功能描述:UART 接口集成電路 Supports C152 100 ld TQFP, 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
XR17C152CM-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
XR17C152IM 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS DUAL UART
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