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SHENZHEN SOFI TECHNOLOGY
User's Guide
16
SP8 Seriel programmer
Connect target chips
Connecting pictures for common 93 and 25 EEPROM are:
There are different connecting ways for different chips.
For details, please open Chip Information in FlyPRO.
Power supply for ISP chips
In ISP program, there are two ways of power supply for target chips. You can set the supply way in the operation
options of FlyPRO.
Power supply by programmers
Power supplied to target boards by programmers, with voltage 3.3V or 5V (Set in the operation options in
FlyPRO).
In this mode, programmers will send messages of supply conflicts if they detect the existence of power in
target boards. Programmers have the function to detect over-current. In power supply to target boards, current
is limited to 250mA, above which, over-current protection occurs. If the target boards' load current exceeds
250mA, please choose "power self-supply by target boards".
Power self-supply by target boards
In this mode, programmers don't supply power to target boards.
SP8 programmers support target boards with voltage 2.7V~5.5V. Type driven voltage of ISP adjusts to the
VCC voltage of target boards.
Declaration
In either supply mode, target board's VCC must be connected to the second pin of the ISP interface.
Keep impending the pins not used, and don't connect them to any information from target boards.
After programming, all ISP interfaces present high-impedance except VCC and GND.
In application, only connect any of the GND pins 4, 6, 8, 10 to target board.