CY7C9689
CY7C9689 HOTLink Transmitter Switching Waveforms (continued)
Write Cycle
Synchronous Interface
EXTFIFO=HIGH
t
REFCLK
t
tR E FL
REFH
FIFOBYP=LOW
REFCLK
tR E F D S
tR E FD H
TXHALT
34
Note
TXSC/D
TXDATA[7:0]
TXDATA[9:8]/TXCMD[2:3]
TXCMD[1:0]
tR E F EN H
NO OPERATION
TXEN
tR E FE N S
t
TRA
t
TXFULL
TXHALF
TRA
TXEMPTY
Write Cycle
Synchronous Interface
EXTFIFO=LOW
FIFOBYP=LOW
REFCLK
tR E FD S
tR E F D H
TXHALT
TXSC/D
35
Note
TXDATA[7:0]
DATA[9:8]/TXCMD[2:3]
TXCMD[1:0]
tR E FE N H
tR E F E N S
TXEN
NO OPERATION
TXFULL
TXHALF
TXEMPTY
Notes:
34. When transferring data to the Transmitter input from a depth expanded external FIFO, the data is captured from the external FIFO one clock cycle following
the actual enable (TXEN = HIGH).
35. When transferring data to the Transmitter input from a synchronous external controller, the data is captured in the same clock cycle as the actual enable
(TXEN = LOW).
29
CYPRESS [ CYPRESS ]
