參數(shù)資料
型號(hào)： DS3253
英文描述： Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
中文描述： 單/雙/三/四路、DS3/E3/STS-1 LIU
文件頁數(shù)： 9/71頁
文件大?。?/td> 925K
代理商： DS3253
DS3251/DS3252/DS3253/DS3254
9 of 71
Figure 4-2. Hardware Mode Block Diagram
5. CONTROL INTERFACE MODES
The DS325x devices can operate in hardware mode or two different CPU bus modes: 8-bit parallel and SPI serial.
In hardware mode, configuration input pins control device configuration, while status output pins indicate device
status. Internal registers are not accessible in hardware mode. The device is configured for hardware mode when
the HW pin is wired high (HW = 1).
In the CPU bus modes, most of the configuration and status pins used in hardware mode are reassigned to the
CPU bus interface. Through the bus interface an external processor can access a set of internal configuration and
status registers. A few configuration and status pins are active in both hardware mode and the CPU bus modes to
support specialized applications, such as protection switching. The device is configured for CPU bus mode when
the HW pin is wired low (HW = 0). The default CPU interface is 8-bit parallel. When the MOT,
RD
and
WR
pins are
all low, the SPI interface is enabled. See Section
15
for more information on the CPU interfaces.
With the exception of the HW pin, configuration and status pins available in hardware mode have corresponding
register bits in the CPU bus mode. The hardware mode pins and the CPU bus mode register bits have identical
names and functions, with the exception that all register bits are active high. For example, LOS is indicated by the
receiver on the
RLOS
pin
(active low) in hardware mode and the RLOS
register bit
(active high) in CPU bus mode.
The few configuration input pins that are active in CPU bus mode also have corresponding register bits. In these
cases, the actual configuration is the logical OR of pin assertion and register bit assertion. For example, the
transmitter output driver is tri-stated if the
TTS
pin
is asserted (i.e., low)
or
the TTS
register bit
is asserted (high).
Figure 4-1
and
Figure 4-2
show block diagrams of the DS325x in hardware mode and in CPU bus mode.
Analog
Local
Loopback
P
Automatic
Gain
Control
+
Adaptive
Equalizer
ALOS
Clock &
Data
Recovery
L
W
Clock
Invert
RXPn
RXNn
TXPn
TXNn
TTSn
PRBSn
TLBOn
TCINV
TPOSn/TDATn
TNEGn
TCLKn
E3Mn
STSn
RNEGn/RLCVn
RCLKn
RPOSn/RDATn
RLOSn
RMONn
Power
Supply
TDSAn,
TDSBn
B3ZS/
HDB3
Encoder
AIS, 100100…,
PRBS Pattern
Generation
M
M
M
PRBS
Detector
B3ZS/HDB3
Decoder
Digital LOS
Detector
squelch
J
(
Driver
Monitor
Loopback Control
TDMn
LLBn
VDD
VSS
TJAn
TBIN
RCINV
Remote
Loopback
Global
Configuration
Output
Drivers,
Clock
Invert
RTSn
RBIN
RJAn
HW
HIZ
RST
Digital
Local
Loopback
RLBn
Clock
Adapter
T3MCLK
E3MCLK
STMCLK
TCLKn
master clock
Dallas
Semiconductor
DS325x
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DS3253N Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS3253+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Triple DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS3253A3 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Triple DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS3253DK 功能描述:網(wǎng)絡(luò)開發(fā)工具 DS3253 Dev Kit RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
DS3253N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Triple DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS3253N# 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Triple DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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