参数资料
型号: PIC18F442-E/PT
厂商: Microchip Technology
文件页数: 60/134页
文件大小: 0K
描述: IC MCU CMOS 40MHZ 8K FLSH 44TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 160
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 16KB(8K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 768 x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 44-TQFP
包装: 托盘
Micrel, Inc.
KSZ8864RMN
April 2012
31
M9999-043012-1.5
Switch MAC3/MAC4 SW3/SW4-RMII Interface
The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). The
KSZ8864RMN supports RMII interface at Port 3 and port 4 switch sides and provides a common interface at MAC3 and
MAC4 layer in the device, and has the following key characteristics:
Supports 10Mbps and 100Mbps data rates.
Uses a single 50 MHz clock reference (provided internally or externally): in internal mode, the chip provides reference
clock from SMxRXC pin to SMxTXC/SMxREFCLK pin and the reference clock-in pin of the opposite RMII; in external
mode, the chip receives 50MHz reference clock from an external oscillator or opposite RMII interface to
SW4TXC/SM4REFCLK pin only.
Provides independent 2-bit wide (bi-bit) transmit and receive data paths.
Table 4 shows two types of RMII connections of MAC to MAC and MAC to PHY,
The first is an external MAC connects to SW3/4-RMII with ‘PHY mode’.
The second is an external PHY connects to SW3/4-RMII with ‘MAC mode’.
When the strap pin P1LED0 is pulled down, the switch MAC4 is SW4-RMII mode after power up reset or warm reset.
When the strap pin P2LED0 is pulled down, the switch MAC3 is SW3-RMII mode after power up reset or warm reset.
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