cxd1944r Sony Electronics, cxd1944r Datasheet - Page 17

• Manufacturer Part Number: cxd1944r
• Description: Ieee1394 3-port 200mbps Cable Transceiver/arbiter
• Manufacturer: Sony Electronics

Status Transfer
the LINK, it will initiate a status transfer. The PHY will wait
until the interface is idle to perform the transfer. The PHY
initiates the transfer by asserting status (01b) on the CTL
pins, along with the first two bits of status information on
D [0 : 1]. The PHY maintains CTL = status for the dura-
Status Transfer Timing
When the PHY has status information to transfer to
PHY
CTL [0:1]
PHY
D [0:1]
00
00
s[0:1]
01
s[2:3]
01
–17–
tion of the status transfer. The PHY may prematurely end
a status transfer by asserting something other than sta-
tus on the CTL pins. This should be done in the event
that a packet arrives before the status transfer com-
pletes. There must be at least one cycle in between con-
secutive status transfers.
s[14:15]
01
00
00
00
00
CXD1944R