参数资料
型号: AT89C51ID2-SLRUM
厂商: Atmel
文件页数: 31/157页
文件大小: 0K
描述: IC 8051 MCU 64K FLASH 44-PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 500
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 标准包装
其它名称: AT89C51ID2-SLRUMDKR
126
AT89C51ID2
4289C–8051–11/05
ISP Protocol Description
Physical Layer
The UART used to transmit information has the following configuration:
Character: 8-bit data
Parity: none
Stop: 2 bits
Flow control: none
Baudrate: autobaud is performed by the bootloader to compute the baudrate
choosen by the host.
Frame Description
The Serial Protocol is based on the Intel Hex-type records.
Intel Hex records consist of ASCII characters used to represent hexadecimal values and
are summarized below
Figure 50. Intel Hex Type Frame
Record Mark:
Record Mark is the start of frame. This field must contain ’:’.
Reclen:
Reclen specifies the number of bytes of information or data which follows the Record
Type field of the record.
Load Offset:
Load Offset specifies the 16-bit starting load offset of the data bytes, therefore this field
is used only for
Data Program Record (see Section “ISP Commands Summary”).
Record Type:
Record Type specifies the command type. This field is used to interpret the remaining
information within the frame. The encoding for all the current record types is described
Data/Info:
Data/Info is a variable length field. It consists of zero or more bytes encoded as pairs of
hexadecimal digits. The meaning of data depends on the Record Type.
Checksum:
The two’s complement of the 8-bit bytes that result from converting each pair of ASCII
hexadecimal digits to one byte of binary, and including the Reclen field to and including
the last byte of the Data/Info field. Therefore, the sum of all the ASCII pairs in a record
after converting to binary, from the Reclen field to and including the Checksum field, is
zero.
Record
Load
Data
Mark
’:’
Reclen
Offset
Type
or
Info
Checksum
1-byte
2-bytes
1-byte
n-bytes
1-byte
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