Copyright © 2013 Microsemi
Rev. 1.7, 17-July-2013 Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Phone (USA): (800) 713-4113, (ROW): (949) 221-7100 Fax: (949) 756-0308
1 Port PSE PoE PD69101 Controller
4 P A I R T Y P I C A L T I M I N G D I A G R A M
t
slave
t
456 msec detection cycle
Class
detection
master
Class
SYNC
Signal
startup
ongoing
detection
slave waits for 16
consecutive clks of
sync high
(~2usec)
Figure 5: 4 Pair Timing Diagram
Serial Communication - Monitoring Mode
When Mode0 and Mode1 Input pins are configured to Serial Monitoring Mode (“01”), the PD69101 transmits out
(continuously and repeatedly) the content of 9 internal registers:
Data Out Stream is transmitted through LED1 (pin 14)
Clock Out Stream is transmitted through LED0 (pin 13)
Data stream is shifted out with a 1 MHz clock (1 µsec).
Total transaction packet length is 116 µsec.
The transmission is repeated every 1 msec.
Between transactions the clock is held low, while data stream out is stable high/low.
Note: To exploit LED1 and LED0 to communicate and monitor transmissions, use a 1 KΩ pull-up resistor to the DVDD.
