参数资料
型号: PIC16F872-E/SS
厂商: Microchip Technology
文件页数: 49/167页
文件大小: 0K
描述: IC MCU CMOS 20MHZ 2K FLSH 28SSOP
产品培训模块: Asynchronous Stimulus
标准包装: 47
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 22
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
EEPROM 大小: 64 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 5x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
包装: 管件
143
8048C–AVR–02/12
ATtiny43U
Notes:
2. The default value of SUT[1:0] results in maximum start-up time for the default clock source.
See Table 6-5 on page 26 for details.
3. The default setting of CKSEL[3:0] results in internal RC Oscillator @ 8.0 MHz. See Table 6-4
on page 25 for details.
Note that fuse bits are locked if Lock Bit 1 (LB1) is programmed. Fuse bits should be pro-
grammed before lock bits. The status of fuse bits is not affected by chip erase.
Fuse bits can also be read by device firmware. See section “Reading the Fuse and Lock Bits
19.2.1
Latching of Fuses
Fuse values are latched when the device enters programming mode and changes to fuse values
have no effect until the part leaves programming mode. This does not apply to the EESAVE
Fuse which will take effect once it is programmed. Fuses are also latched on power-up.
19.3
Device Signature Imprint Table
The device signature imprint table is a dedicated memory area used for storing miscellaneous
device information, such as the device signature and oscillator calibaration data. Most of this
memory segment is reserved for internal use, as outlined in Table 19-6.
Notes:
1. See section “Signature Bytes” for more information.
2. See section “Calibration Byte” for more information.
Table 19-5.
Fuse Low Byte
Fuse Low Byte
Bit No
Description
Default Value
7
Divide clock by 8
0 (programmed)
CKOUT
6
Clock Output Enable
1 (unprogrammed)
SUT1
5
Select start-up time
1 (unprogrammed)(2)
SUT0
4
Select start-up time
0 (programmed)(2)
CKSEL3
3
Select Clock source
0 (programmed)(3)
CKSEL2
2
Select Clock source
0 (programmed)(3)
CKSEL1
1
Select Clock source
1 (unprogrammed)(3)
CKSEL0
0
Select Clock source
0 (programmed)(3)
Table 19-6.
Contents of Device Signature Imprint Table.
Address
High Byte
0x00
Signature byte 0 (1)
0x01
Calibration data for internal oscillator (2)
0x02
Signature byte 1 (1)
0x03
Reserved for internal use
0x04
Signature byte 2 (1)
0x05 ... 0x2A
Reserved for internal use
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