参数资料
型号: PIC16F872-E/SS
厂商: Microchip Technology
文件页数: 55/167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
149
8048C–AVR–02/12
ATtiny43U
Figure 19-3. Programming the Flash Waveforms
Note:
1. “XX” is don’t care. The letters refer to the programming description above.
I. Repeat B through H until the entire Flash is programmed or until all data has been
programmed.
J. End Page Programming
1.
1. Set XA1, XA0 to “10”. This enables command loading.
2.
Set DATA to “0000 0000”. This is the command for No Operation.
3.
Give CLKI a positive pulse. This loads the command, and the internal write signals are
reset.
19.6.5
Programming the EEPROM
The EEPROM is organized in pages, see Table 19-9 on page 144. When programming the
EEPROM, the program data is latched into a page buffer. This allows one page of data to be
programmed simultaneously. The programming algorithm for the EEPROM data memory is as
follows (refer to “Programming the Flash” on page 147 for details on Command, Address and
Data loading):
1.
A: Load Command “0001 0001”.
2.
G: Load Address High Byte (0x00 - 0xFF).
3.
B: Load Address Low Byte (0x00 - 0xFF).
4.
C: Load Data (0x00 - 0xFF).
5.
E: No action.
K: Repeat 3 through 5 until the entire buffer is filled.
L: Program EEPROM page
1.
Set BS1 to “0”.
2.
Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY
goes low.
3.
Wait until to RDY/BSY goes high before programming the next page (See Figure 19-4
for signal waveforms).
RDY/BSY
WR
OE
RESET +12V
0x10
ADDR. LOW
ADDR. HIGH
DATA
DATA LOW
DATA HIGH
ADDR. LOW
DATA LOW
DATA HIGH
XA1/BS2
XA0
PAGEL/BS1
CLKI
XX
AB
CD
E
B
C
D
E
G
H
F
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