參數(shù)資料
型號： AT89LS8252-12AC
廠商： Atmel
文件頁數(shù)： 13/35頁
文件大?。?/td> 0K
描述： IC MICRO CTRL 12MHZ 44TQFP
標準包裝： 160
系列： 89LS
核心處理器： 8051
芯體尺寸： 8-位
速度： 12MHz
連通性： SPI，UART/USART
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 8KB（8K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量： 256 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 6 V
振蕩器型： 內(nèi)部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-TQFP
包裝： 托盤
其它名稱： AT89LS825212AC
AT89LS8252
0850C–MICRO–3/06
20
Instruction Set
Notes:
1. DATA polling is used to indicate the end of a write cycle which typically takes less than 10 ms at 2.7V.
2. “aaaaa” = high order address.
3. “x” = don’t care.
Instruction
Input Format
Operation
Byte 1
Byte 2
Byte 3
Programming Enable
1010 1100
0101 0011
xxxx xxxx
Enable serial programming interface after RST goes
high.
Chip Erase
1010 1100
xxxx x100
xxxx xxxx
Chip erase both 8K & 2K memory arrays.
Read Code Memory
aaaa a001
low addr
xxxx xxxx
Read data from Code memory array at the selected
address. The 5 MSBs of the first byte are the high order
address bits. The low order address bits are in the
second byte. Data are available at pin MISO during the
third byte.
Write Code Memory
aaaa a010
low addr
data in
Write data to Code memory location at selected
address. The address bits are the 5 MSBs of the first
byte together with the second byte.
Read Data Memory
00aa a101
low addr
xxxx xxxx
Read data from Data memory array at selected
address. Data are available at pin MISO during the third
byte.
Write Data Memory
00aa a110
low addr
data in
Write data to Data memory location at selected address.
Write Lock Bits
1010 1100
x x111
xxxx xxxx
Write lock bits.
Set LB1, LB2 or LB3 = “0” to program lock bits.
Serial Programming Algorithm
To program and verify the AT89LS8252 in the serial pro-
gramming mode, the following sequence is recommended:
1.
Power-up sequence:
Apply power between VCC and GND pins.
Set RST pin to “H”.
If a crystal is not connected across pins XTAL1 and
XTAL2, apply a 3 MHz to 12 MHz clock to XTAL1 pin
and wait for at least 10 milliseconds.
2.
Enable serial programming by sending the Pro-
gramming Enable serial instruction to pin MOSI/
P1.5. The frequency of the shift clock supplied at
pin SCK/P1.7 needs to be less than the CPU clock
at XTAL1 divided by 40.
3.
The Code or Data array is programmed one byte at
a time by supplying the address and data together
with the appropriate Write instruction. The selected
memory location is first automatically erased before
new data is written. The write cycle is self-timed and
typically takes less than 2.5 ms at 5V and less than
10 ms at 2.7V.
4.
Any memory location can be verified by using the
Read instruction which returns the content at the
selected address at serial output MISO/P1.6.
5.
At the end of a programming session, RST can be
set low to commence normal operation.
Power-off sequence (if needed):
Set XTAL1 to “L” (if a crystal is not used).
Set RST to “L”.
Turn VCC power off.
Serial Programming Instruction
The Instruction Set for Serial Programming follows a 3-byte
protocol and is shown in the following table:
LB
1
LB
2
LB
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LS8252-12AI 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
AT89LS8252-12AU 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
AT89LS8252-12JC 功能描述:8位微控制器 -MCU Low V w/8k RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
AT89LS8252-12JI 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
AT89LS8252-12PC 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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