Atmel AVR 8-bit and 32-bit microcontrollers offer high performance, power efficiency and design flexibility for a wide range of applications.
This application note describes the Atmel® ATMEL microcontroller , the CPLD download line interface, and the AT89SISP programmer for programming the AT89SX microcontroller online.
AT89ISP software Atmel's online programming software has been downloaded from our website. Please refer to the software description for the specific operation method (download), the software can run on Windows? 9x/ME/2000/NT? operating system. Atmel ISP software provides the following types of microcontrollers that can be written: AT89S51, AT89S52, AT89S53, AT89LS53, AT89LS8252, AT89LS8252 and so on. The crystal input used by the user's target board can be provided (the crystal used by the user may be different).
AT89ISP cable
In order to use Atmel microcontroller online programming software, users need to use ATMEL microcontroller, CPLD download line. The programmer's pins should be manually connected to the board containing the AT89S chip (target board, or user board) as shown in Figure 1. The 25-pin cable is connected to the parallel port (also known as the print port) of the computer (PC). . In order to facilitate online programming, the reserved on-line programming port should be soldered on the user board (as shown below).
Some people often use PROTEL's standard library IDC10 to design the lead interface of the programmer, but generally do not know how to connect (the first end is the end), for your convenience, we provide the following figure (Figure 4) You only need to add the following interface when designing the board to easily implement your board with ISP function.
The board is designed to be connected to the AT89S series of microcontrollers in the pin order of Table 1. This part of the design of the board is completed;
When soldering, please note that the general standard is that the first leg is a square pad, and the other pins are round pads, so that the position of the first pin can be easily found, and then the socket of the IDC10 is inserted into the circuit in the order of FIG. On the board, you can solder.
Note: If the IDC you are designing is at the top level, the socket should be inserted from the top; otherwise it is inserted from the bottom. That is to say: if the components of your IDC10 are placed on the top layer and you actually want to solder the components, be sure to change the order! ! !
The voltage range ATMEL microcontroller and CPLD download line require the target board to provide a stable DC power supply. It is also required to supply the AT89ISP programmer with a limited voltage range. The power supply to the ATMEL microcontroller and CPLD download line should be between 3.3V and 5.5V.
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