欢迎访问ic37.com |
会员登录 免费注册
发布采购

AT89S52-33PC 参数 Datasheet PDF下载

AT89S52-33PC图片预览
型号: AT89S52-33PC
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器具有8K字节的系统内可编程闪存 [8-bit Microcontroller with 8K Bytes In-System Programmable Flash]
分类和应用: 闪存微控制器
文件页数/大小: 30 页 / 231 K
品牌: ATMEL [ ATMEL ]
 浏览型号AT89S52-33PC的Datasheet PDF文件第13页浏览型号AT89S52-33PC的Datasheet PDF文件第14页浏览型号AT89S52-33PC的Datasheet PDF文件第15页浏览型号AT89S52-33PC的Datasheet PDF文件第16页浏览型号AT89S52-33PC的Datasheet PDF文件第18页浏览型号AT89S52-33PC的Datasheet PDF文件第19页浏览型号AT89S52-33PC的Datasheet PDF文件第20页浏览型号AT89S52-33PC的Datasheet PDF文件第21页  
AT89S52  
frequency should be less than 1/16 of the crystal fre-  
quency. With a 33 MHz oscillator clock, the maximum SCK  
frequency is 2 MHz.  
appropriate Write instruction. The write cycle is self-  
timed and typically takes less than 1 ms at 5V.  
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.  
Serial Programming Algorithm  
5. At the end of a programming session, RST can be  
set low to commence normal device operation.  
To program and verify the AT89S52 in the serial program-  
ming mode, the following sequence is recommended:  
Power-off sequence (if needed):  
Set XTAL1 to “L” (if a crystal is not used).  
Set RST to “L”.  
1. Power-up sequence:  
Apply power between VCC and GND pins.  
Set RST pin to “H”.  
Turn VCC power off.  
If a crystal is not connected across pins XTAL1 and  
XTAL2, apply a 3 MHz to 33 MHz clock to XTAL1 pin  
and wait for at least 10 milliseconds.  
Data Polling: The Data Polling feature is also available in  
the serial mode. In this mode, during a write cycle an  
attempted read of the last byte written will result in the com-  
plement of the MSB of the serial output byte on MISO.  
2. Enable serial programming by sending the Pro-  
gramming Enable serial instruction to pin  
MOSI/P1.5. The frequency of the shift clock sup-  
plied at pin SCK/P1.7 needs to be less than the  
CPU clock at XTAL1 divided by 16.  
Serial Programming Instruction Set  
The Instruction Set for Serial Programming follows a 4-byte  
protocol and is shown in Table 10.  
3. The Code array is programmed one byte at a time  
by supplying the address and data together with the  
17