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参数资料
| 型号： | CP2201-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 25/108页 |
| 文件大小： | 0K |
| 描述： | IC ETH CTRLR SNGL-CHIP 28QFN |
| 标准包装： | 73 |
| 控制器类型： | 以太网控制器，MAC/10Base-T |
| 接口： | 并行/串行 |
| 电源电压： | 3.1 V ~ 3.6 V |
| 电流 - 电源： | 75mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN（5x5） |
| 包装： | 管件 |
| 产品目录页面： | 627 (CN2011-ZH PDF) |
| 配用： | 336-1326-ND - KIT REF DESIGN PWR OVER ETHERNET 336-1316-ND - KIT EVAL FOR CP2201 ETH CTRLR |
| 其它名称： | 336-1313 |
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CP2200/1
Rev. 1.0
23
7. Internal Memory and Registers
The CP2200/1 is controlled through direct and indirect registers accessible through the parallel host interface. The
host interface provides an 8-bit address space, of which there are 114 valid direct register locations (see Table 11
on page 25). All remaining addresses in the memory space are reserved and should not be read or written. The
direct registers provide access to the RAM buffers, Flash memory, indirect MAC configuration registers, and other
status and control registers for various device functions.
Figure 13 shows the RAM and Flash memory organization. The transmit and receive RAM buffers share the same
address space and are both accessed using the RAMADDRH:RAMADDRL pointer. Each of the buffers has a
dedicated data register. The Flash memory has a separate address space and a dedicated address pointer and
data register. See “13. Flash Memory” on page 73 for detailed information on how to read and write to Flash.
Figure 13. RAM Buffers and Flash Memory Organization
7.1. Random Access to RAM Transmit and Receive Buffers
The most common and most efficient methods for accessing the transmit and receive buffers are the AutoWrite
and AutoRead interfaces. These interfaces allow entire packets to be written or read at a time. In very few cases,
the transmit and receive buffers may need to be accessed randomly. An example of this is a system in which a
specific byte in the packet is checked to determine whether to read the packet or discard it. The following
procedure can be used to read or write data to either RAM buffer:
Step 1: Write the address of the target byte to RAMADDRH:RAMADDRL.
Step 2: Transmit Buffer:
Read or write 8-bit data to RAMTXDATA to read or write from the target byte in the transmit buffer.
Receive Buffer:
Read or write 8-bit data to RAMRXDATA to read or write from the target byte in the receive buffer.
Note: Reads and writes of the RAM buffers using the random access method are independent of the
AutoRead and AutoWrite interfaces. Each of the interfaces has a dedicated set of address and data
registers. See “11.2. Transmitting a Packet” on page 48 and “12.2. Reading a Packet Using the
Autoread Interface” on page 58 for additional information about the AutoRead and AutoWrite
interfaces.
Flash Memory (8K)
0x0000 – 0x1FFF
Transmit Buffer (2K)
0x0000 – 0x07FF
Receive Buffer (4K)
0x0000 – 0x0FFF
RAMADDRH:RAMADDRL
FLASHADDRH:FLASHADDRL
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CP2201-GMR | 功能描述:以太网 IC Ethernet Controller RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| CP-220-K | 制造商:PREMO 制造商全称:PREMO CORPORATION S.L 功能描述:Coils and Chokes for general use |
| CP221 | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:Small Signal Transistor |
| CP-221 1 1/2"BL 100' | 功能描述:HEATSHRNK CP221 1-1/2" X 100'BLK 制造商:3m 系列:CP-221 零件状态:过期 类型:套管，弹性 收缩率:2 至 1 长度:100'（30.48m） 内径（出厂）:1.500"（38.1mm） 内径 - 恢复后:0.752"（19.1mm） 恢复后的壁厚:0.040"（1.02mm） 材料:聚烯烃（PO） 特性:自熄灭 颜色:黑 工作温度:-55°C ~ 135°C 收缩温度:121°C 标准包装:1 |
| CP-221 1 1/2"BL 100' | 制造商:3M Electronic Products Division 功能描述:HEATSHRNK CP221 1-1/2" X 100'BLK 制造商:3M Electronic Products Division 功能描述:HEATSHRNK CP221 1-1/2" X 25' BLK |
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