Analog Devices ADSP-TS101 TigerSHARC Hardware Reference Manual page 312

Link Port Communication Protocol
LxCLKOUT
B I S READY TO RECEIVE
LxCLKIN
LxDAT7:0
Figure 8-4. Link A to Link B Begins Transmission
1. A token request is issued to the receiver when the transmitter drives
its
LxCLKOUT
2. During the token request the transmitter waits for six cycles to ver-
ify that
(Transmit Acknowledge), then enables transmission start.
3. The transmitter drives the quad-word data on to the
lines, one byte at a time, least significant byte first, at the rising and
falling edges of its
4. One cycle after the transmission starts, the receiver drives the trans-
mitter's
low, indicating a receiver stall, another quad-word cannot be trans-
mitted until the receive buffer is free. When the buffer is empty,
the receiver sets
for another token request.
8-10
TOKEN REQUEST
low.
is high, indicating that it is ready to receive
LxCLKIN
LxCLKOUT
low for a connectivity check. If
LxCLKIN
high (Transmit Acknowledge), to be ready
LxCLKIN
A MAY START
TRANSMIT IF LXCLKIN IS HIG H
CONNECTIVITY
CHECK
B0 B1 B2 B3 B4
.
ADSP-TS101 TigerSHARC Processor
NEXT TRANSFER
ACKNOWLEDGE
B5 B6 B7 B8 B9
LxDAT7–0
remains
LxCLKIN
Hardware Reference