参数资料
型号: PIC18F4431-E/PT
厂商: Microchip Technology
文件页数: 8/119页
文件大小: 0K
描述: IC MCU FLASH 8KX16 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,电源控制 PWM,QEI,POR,PWM,WDT
输入/输出数: 36
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 9x10b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 44-TQFP
包装: 托盘
Micrel, Inc.
KSZ8842-PMQL/PMBL
October 2007
105
M9999-100207-1.5
Examples:
1. MIB Counter Read (read port 1 “Rx64Octets” counter at indirect address offset 0x0E)
Write to reg. IACR with 0x1c0e (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR5 (MIB counter value 31-16) // If bit 31 =1, there was a counter overflow
// If bit 30 =0, restart (reread) from this register
Read reg. IADR4 (MIB counter value 15-0)
2. MIB Counter Read (read port 2 “Rx64Octets” counter at indirect address offset 0x2E)
Write to reg. IACR with 0x1c2e (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR5 (MIB counter value 31-16) // If bit 31 =1, there was a counter overflow
// If bit 30 =0, restart (reread) from this register
Read reg. IADR4 (MIB counter value 15-0)
3. MIB Counter Read (read “Port1 TX Drop Packets” counter at indirect address offset 0x100)
Write to reg. IACR with 0x1d00 (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR4 (MIB counter value 15-0)
Additional MIB Information
Per Port MIB counters are designed as “read clear”. That is, these counters will be cleared after they are read.
All Port Dropped Packet MIB counters are not cleared after they are accessed. The application needs to keep track of
overflow and valid conditions on these counters.
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