16
Good Read LED
The EM1365-LD provides a pin (LED, PIN 10) on the host interface connector that can be used by an
external driver circuit to drive an LED to indicate a Good Read status. When a good read occurs, the LED
pin produces a high level output for about 300ms, then the signal is back to a low level. This Good Read
LED output is not strong enough to drive an LED, so an LED driver circuit is needed.
The following Good Read LED driver circuit is provided for reference.
2N3904
Q8
R1 1K
LED
R3
1k
LED
D3
R2
10K
VDD
Содержание EM1365-LD
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