Cypress CY4672 Espresso Maker User Manual


 
CY4672 Reference Design Guide, Document # 001-16968 Revision ** 77
Bridge
Figure 5-4 shows the PRoC LP RDK bridge connected with a USB adapter board to a PSoC Mini-
Prog.
Figure 5-4. RDK Bridge with USB Adapter and PSoC MiniProg
5.2.3 Schematics
The PRoC LP RDK bridge schematics and Gerber files are located in the following directory:
<installation directory>\Hardware\Bridge. The schematic is in Adobe Acrobat PDF for-
mat with the letters ‘Sch’ in the file name.
5.2.4 LED Usage
Red LED:
The red LED blinks ON/OFF when the bridge is in Bind mode. The ON and OFF time is approxi-
mately 320 ms which is the rate at which the bridge changes channels during the Bind process.
The red LED also blinks ON/OFF when the PC is suspended. The blinking rate is approximately
1 second which is the frequency of the wake up interrupts.
Green LED:
The green LED turns on when the bridge receives data from the mouse or keyboard. It remains
on for 250 ms since the last received Data packet.
The green LED turns on and remains on if a key is pressed and held (due to the keyboard’s send-
ing Keep Alive packets).
The green LED turns on and remains on during ping mode (in normal operation, ping mode is a
very short period. The user may not notice this period).
The Red and Green LED are blinking alternately when in Manufacturing Test mode.
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