DS2148T (Maxim) PDF资料下载 Datasheet(17/73 页)

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型号：	DS2148T
厂商：	Maxim Integrated Products
文件页数：	17/73页
文件大小：	0K
描述：	IC LIU E1/T1/J1 5V 44-TQFP
产品培训模块：	Lead (SnPb) Finish for COTS
产品变化通告：	Product Discontinuation 20/Feb/2012
标准包装：	160
类型：	线路接口装置（LIU）
驱动器/接收器数：	1/1
规程：	T1/E1/J1
电源电压：	4.75 V ~ 5.25 V
安装类型：	表面贴装
封装/外壳：	44-TQFP
供应商设备封装：	44-TQFP（10x10）
包装：	管件

DS2148/DS21Q48

24 of 73

3.2 Parallel Port Operation

When using the parallel interface on the DS2148 (BIS1 = 0) the user has the option for either multiplexed

bus operation (BIS1 = 0, BIS0 = 0) or nonmultiplexed bus operation (BIS1 = 0, BIS0 = 1). The DS2148

can operate with either Intel or Motorola bus timing configurations. If the PBTS pin is tied low, Intel

timing will be selected; if tied high, Motorola timing will be selected. All Motorola bus signals are listed

in parentheses. See the timing diagrams in Section 10 for more details.

3.3 Serial Port Operation

Setting BIS1 = 1 and BIS0 = 0 enables the serial bus interface on the DS2148. Port read/write timing is

unrelated to the system transmit and receive timing, allowing asynchronous reads or writes by the host.

See Section 10 for the AC timing of the serial port. All serial port accesses are LSB first. See Figure 3-1,

Reading or writing to the internal registers requires writing one address/command byte prior to

transferring register data. The first bit written (LSB) of the address/command byte specifies whether the

access is a read (1) or a write (0). The next 5 bits identify the register address. Bit 7 is reserved and must

be set to 0 for proper operation.

The last bit (MSB) of the address/command byte is the burst mode bit. When the burst bit is enabled

(B = 1) and a READ operation is performed, addresses 0 through 15h are read sequentially, starting at

address 0h. And when the burst bit is enabled and a WRITE operation is performed, addresses 0 through

16h are written sequentially, starting at address 0h. Burst operation is stopped once address 15h is read.

See Figure 3-5 and Figure 3-6 for more details.

All data transfers are initiated by driving the

CS input low. When input clock-edge select (ICES) is low,

input data is latched on the rising edge of SCLK and when ICES is high, input data is latched on the

falling edge of SCLK. When output clock-edge select (OCES) is low, data is output on the falling edge of

SCLK and when OCES is high, data is output on the rising edge of SCLK. Data is held until the next

falling or rising edge. All data transfers are terminated if the

CS input transitions high. Port control logic

is disabled and SDO is tri-stated when

CS is high.

相关代理商/技术参数	参数描述
DS2148T+	功能描述:网络控制器与处理器 IC 5V E1/T1/J1 Line Interface 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
DS2148TA2	功能描述:网络控制器与处理器 IC 5V E1/T1/J1 Line Interface 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
DS2148TB	功能描述:网络控制器与处理器 IC 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
DS2148TC1	功能描述:网络控制器与处理器 IC 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
DS2148TN	功能描述:网络控制器与处理器 IC 5V E1/T1/J1 Line Interface 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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