參數(shù)資料
型號: AT89C51ID2-SLSUM
廠商: Atmel
文件頁數(shù): 31/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 972
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
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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