参数资料
型号: PIC16F74-E/PT
厂商: Microchip Technology
文件页数: 56/104页
文件大小: 0K
描述: IC MCU FLASH 4KX14 A/D 44TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 160
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 33
程序存储器容量: 7KB(4K x 14)
程序存储器类型: 闪存
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 8x8b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 44-TQFP
包装: 托盘
其它名称: PIC16F74E/PT
Micrel, Inc.
KSZ8851-16MLLJ
March 2010
47
M9999-030210-1.0
On-Chip Bus Control Register (0x20 – 0x21): OBCR
This register controls the on-chip bus clock speed for the KSZ8851-16MLLJ. The default of the on-chip bus clock speed is
125MHz. When the external host CPU is running at a higher clock rate, the on-chip bus should be adjusted for the best
performance.
Bit
Default Value
R/W
Description
15-7
-
RW
Reserved.
6
0
RW
Output Pin Drive Strength
Bi-directional or output pad drive strength selection.
0: 8 mA; 1: 16 mA
5-3
-
RW
Reserved.
2
0
RW
On-Chip Bus Clock Selection
0: 125MHz (default setting is divided by 1, Bit[1:0]=00)
1: NA (reserved)
1-0
0x0
RW
On-Chip Bus Clock Divider Selection
00: Divided by 1; 01: Divided by 2; 10: Divided by 3; 11: NA (reserved).
For example to contol the bus clock speed as below:
If Bit 2 = 0 and this value is set 00 to select 125 MHz.
If Bit 2 = 0 and this value is set 01 to select 62.5 MHz.
EEPROM Control Register (0x22 – 0x23): EEPCR
To support an external EEPROM, pulled-up the EED_IO pin to High; otherwise, it is pulled-down to Low. If an external
EEPROM is not used, the software programs the host MAC address. If an EEPROM is used in the design, the chip host
MAC address is loaded from the EEPROM immediately after reset. The KSZ8851-16MLLJ allows the software to access
(read and write) the EEPROM directly; that is, the EEPROM access timing can be fully controlled by the software if the
EEPROM Software Access bit is set.
Bit
Default Value
R/W
Description
15-6
-
RO
Reserved.
5
0
WO
EESRWA EEPROM Software Read or Write Access
0: software read enable to access EEPROM when software access enabled (bit4=1)
1: software write enable to access EEPROM when software access enabled (bit4=1).
4
0
RW
EESA EEPROM Software Access
1: enable software to access EEPROM through bit 3 to bit 0.
0: disable software to access EEPROM.
3
-
RO
EESB EEPROM Status Bit
Data Receive from EEPROM. This bit directly reads the EED_IO pin.
2-0
0x0
RW
EECB EEPROM Control Bits
Bit 2: Data Transmit to EEPROM. This bit directly controls the device’s EED_IO pin.
Bit 1: Serial Clock. This bit directly controls the device’s EESK pin.
Bit 0: Chip Select for EEPROM. This bit directly controls the device’s EECS pin.
相关PDF资料
PDF描述
PIC16LC65B-04/L IC MCU OTP 4KX14 PWM 44PLCC
ALD4213PCL IC SW ANLG QUAD SPST 16PDIP
PIC16F874AT-I/PT IC MCU CMOS 20MHZ 4K FLSH 44TQFP
PIC24FJ256GA110T-I/PT IC PIC MCU FLASH 256K 100TQFP
PIC24FJ192GB110-I/PT IC PIC MCU FLASH 100TQFP
相关代理商/技术参数
参数描述
PIC16F74-I/L 功能描述:8位微控制器 -MCU 7KB 192 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC16F74-I/L 制造商:Microchip Technology Inc 功能描述:8BIT FLASH MCU SMD 16F74 PLCC44
PIC16F74-I/L 制造商:Microchip Technology Inc 功能描述:Microcontroller IC Number of I/Os:33
PIC16F74-I/ML 功能描述:8位微控制器 -MCU 7KB 192 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC16F74-I/P 功能描述:8位微控制器 -MCU 7KB 192 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT