参数资料
| 型号： | DS26303DK |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/43页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN FOR DS26303 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 电信，线路接口单元（LIU） |
| 已用 IC / 零件： | DS26303 |
| 已供物品： | 板，线缆，电源 |
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DS26303 Design Kit
PROM SPI Configuration
In software mode, it is possible to configure the DS26303 using a parallel interface or a serial peripheral interface
(SPI). Most advanced microcontrollers have both a parallel interface and SPI interface such as the microcontroller
on the DS26303DK. The command you send to the microcontroller through either the USB or serial port
determines if that data is placed on the parallel or SPI bus. Refer to the data sheet for Chipview on the particular
commands required to switch data ports.
A unique feature with the SPI port is that a PROM can be used to provide the LIU with the specific data needed for
configuration. If the data in the PROM is formatted a certain way, it can seem as the PROM is acting like a
controller with a SPI interface in master mode.
The most common PROMs to use for this type of application are those with an internal address accumulator. This
feature for the PROM is important because the device must automatically jump to the next available address in the
configuration memory. The Xilinx XC18V00 device family is a byte-wide nonvolatile memory with an autoincrement
address function. The family of devices is available in 1Mb, 2Mb, and 4Mb densities. The PROM is also useful
because the device can perform in-circuit programming with the JTAG port. Refer the data sheet for the XC18V00
for the JTAG codes for programming the configuration memory.
Figure 2 shows a general relationship of the timing for a SPI bus. For this case, all data is clocked into the slave
device on the rising edge of SCLK. This feature can be configurable on the DS26303.
Figure 2. SPI Timing Diagram
SCLK 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CSB
SDI
0
(lsb)
A1
A2
A3
A4
A5
A
6
x
(adrs
msb)
DO
(lsb)
D1
D2
D3
D4
D5
D6
D7
(msb)
WRITE ACCESS ENABLED
SDO
Figure 3 shows a simplified diagram of the XC18V00 device and the DS26303 in SPI (serial) mode. Notice a few
key points about this diagram. First, the CLK for the XC18V00 is the MCLK for the LIU, but this is not the SCLK for
the SPI interface. The SCLK can be programmed as needed. See Table 5 for an example of the memory map.
Second, the programming for this device begins when OE on the XC18V00 goes high. Therefore, consideration
must be taken if some delay is necessary. Generally, it is sufficient for the OE pin to be connected to some power-
up delay device. The OE delay is not necessary on this DK.
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PDF描述 |
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| DS26519DK | KIT DEMO FOR DS26519 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS26303G-120 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| DS26303G-75 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| DS26303GN-120 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| DS26303GN-75 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| DS26303L-120 | 功能描述:电信线路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
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