Section 4
Troubleshooting Guide
Table 4.
Troubleshooting Guide
Problem
The blue Power LED is not on.
The AVR device cannot be
programmed.
AVR Studio does not detect
JTAG or ISP programmer.
FLIP program not working.
AT88CK109STK User Guide
Reason
USB Port of AT88Microbase is not
connected to PC.
The JTAG header is not connected
to JTAG programmer.
The memory lock bits are
programmed.
Reset disable fuse is set.
Programming too fast with ISP SPI
USB Port of AT88Microbase is not
connected to PC (programmed
through USB).
AT88Microbase is not in DFU mode.
The communication medium in FLIP
hasn't been selected
JTAG or ISP programmer is not
connected or power is off.
AT88Microbase is not in DFU mode.
Solution
Connect AT88Microbase USB port
to PC's USB port.
Connect the JTAG header to the
JTAG programmer.
Erase the memory before
programmed.
Check reset disable fuse.
Check oscillator settings and make
sure it is not set higher than SPI
clock
Connect AT88Microbase USB port
to PC's USB port.
― Press and hold the “HWB” push
button.
― Press the “RESET” push button.
― Release the “RESET” push
button.
― Release the “HWB” push button.
From the FLIP menu, select
“Settings > Communication > USB”.
Connect JTAG programmer to
JTAG header or ISP programmer to
ISP header and check power
connections.
JTAG to load the bootloader and set
(check) the HWBE fuse.
Correct fuse settings:
Reading fuses address 0 to 2..
0xDE, 0x99, 0xF3
4-1
8699A—CRYPTO—10/09
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相关代理商/技术参数
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