Atmel C51 Datový list stáhnout pdf (Strana 20)

7764A–8051–11/07

3.2 In-System Programming does not work

Possible root cause External Code Internal Code

MCU is not working in ISP mode

NOT

APPLICABLE

Apply the hardware condition. See “In-System Programming (ISP)” on page

14. and read the device’s bootloader datasheet.

MCU does not work properly

Monitor power supplies, XTAL2, RST, EA, ALE, PSEN ( See “MCU not

starting or operating in a reliable way” on page 19.)

Device is damaged Try a new or another device

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Atmel C51 Datový list Strana 20