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| 型号： | DS3254N+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 71/71页 |
| 文件大小： | 0K |
| 描述： | IC LIU DS3/E3/STS-1 144-CSBGA |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 160 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 4/4 |
| 规程： | IEEE 1149.1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 144-BGA，CSPBGA |
| 供应商设备封装： | 144-TECSBGA（13x13） |
| 包装： | 托盘 |
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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 and the ALE pin is high, 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
Pr
eam
p
Automatic
Gain
Control
+
Adaptive
Equalizer
ALOS
Clock &
Data
Recovery
Li
ne
D
riv
er
Wavesha
p
ing
Clock
Invert
RXPn
RXNn
TXPn
TXNn
TTSn
PRBSn
TLBOn
TCINV
TPOSn/TDATn
TCLKn
TNEGn
E3Mn
RNEGn/RLCVn
RCLKn
RPOSn/RDATn
RLOSn
RMONn
Power
Supply
TDSAn,
TDSBn
B3ZS/
HDB3
Encoder
AIS, 100100…,
PRBS Pattern
Generation
Mu
x
Mu
x
Mu
x
PRBS
Detector
B3ZS/HDB3
Decoder
Digital LOS
Detector
squelch
Jitter
Att
enu
ato
r
(c
an
be
pl
ac
ed
in
ei
th
er
the
r
e
ce
iv
e
p
a
th
or
th
e
tr
ansm
it
pat
h
)
Driver
Monitor
Loopback Control
TDMn
LLBn
VDD
VSS
TJAn
TBIN
RCINV
Remote
Loopback
Global
Configuration
STSn
Output
Drivers,
Clock
Invert
RTSn
RBIN
RJAn
HW
HIZ
Digital
Local
Loopback
RLBn
RST
Clock
Adapter
T3MCLK E3MCLK STMCLK
TCLKn
master clock
Dallas
Semiconductor
DS325x
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| DS3254N# | 功能描述:网络控制器与处理器 IC Quad DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS3254N+ | 功能描述:网络控制器与处理器 IC Quad DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS3254NA3 | 制造商:Maxim Integrated Products 功能描述:QUAD ENH DS3/E3 LIU REV A3 IND - Rail/Tube |
| DS3256 | 功能描述:网络控制器与处理器 IC X6 T3/E3 Line Interface Unit RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS3256N | 功能描述:网络控制器与处理器 IC X6 T3/E3 Line Interface Unit RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
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