AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 95
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
AT89C51RC2
Manufacturer Part Number
AT89C51RC2
Description
Manufacturer
Atmel Corporation
Specifications of AT89C51RC2
Flash (kbytes)
32 Kbytes
Max. Operating Frequency
60 MHz
Cpu
8051-12C
Max I/o Pins
32
Spi
1
Uart
1
Sram (kbytes)
1.25
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART
Watchdog
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RC2-3CSUM
Manufacturer:
ATMEL
Quantity:
15 569
Company:
Part Number:
AT89C51RC2-CM
Manufacturer:
ATMEL
Quantity:
8 831
Part Number:
AT89C51RC2-CM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C51RC2-IM
Manufacturer:
ATMEL
Quantity:
719
Part Number:
AT89C51RC2-IM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C51RC2-RLRIL
Manufacturer:
Atmel
Quantity:
1 495
Company:
Part Number:
AT89C51RC2-RLTIL
Manufacturer:
ATMEL
Quantity:
5 000
Part Number:
AT89C51RC2-RLTUM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
ISP Protocol Description
Physical Layer
Frame Description
4180E–8051–10/06
The UART used to transmit information has the following configuration:
•
•
•
•
•
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.
Table 70. Intel Hex Type Frame
•
•
•
•
•
•
Record Mark ‘:’
Character: 8-bit data
Parity: none
Stop: 1 bit
Flow control: none
Baud rate: autobaud is performed by the bootloader to compute the baud rate
choosen by the host.
Record Mark:
–
Reclen:
–
Load Offset:
–
–
Record Type:
–
Data/Info:
–
Checksum:
–
1 byte
Record Mark is the start of frame. This field must contain ’:’.
Reclen specifies the number of Bytes of information or data which follows
the Record Type field of the record.
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 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 in Section “ISP Commands Summary”.
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.
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.
Reclen
1 byte
Load Offset
2 bytes
Record Type
1 bytes
AT89C51RB2/RC2
Data or Info
n byte
Checksum
1 byte
95