Transmission Delays - Analog Devices ADSP-TS101 TigerSHARC Hardware Reference Manual

The former transmitter must keep the
antee the token switch takes place. (See the ADSP-TS101 TigerSHARC
Embedded Processor Data Sheet.) The receiver must request the token
switch when it senses its
the token switch in time and the transmitter has more data to send, the
transmitter indicates that it regrets the token switch by setting
low (token request), which cancels the token switch.
An example of a token switch regret is shown in Figure 8-9. In this
example:
• After the transmitter has set
this as token switch enable and requests the token switch.
• The receiver's request is too late to guarantee the token switch and
the transmitter signals a regret by setting
receiver identifies this and goes back to being a receiver. The
receiver indicates that it is ready to receive more data by acknowl-
edging. The transmitter starts transmitting again.
• The
LxDIR
the token switch. The transmitter sets its
when the transmitter starts to transmit data again. The receiver
does not set its
of transmitting data.

Transmission Delays

The links should be able to function even if there are delays between the
source and destination. The delays of the different link signals (
) are matched to tolerances specified in the data sheet.
LxDAT
ADSP-TS101 TigerSHARC Processor
Hardware Reference
is high. If the receiver does not request
LxCLKIN
LxCLKOUT
pin of the transmitter changes to low when it enables
output high because it never gets to the point
LxDIR
high long enough to guar-
LxCLKOUT
high, the receiver identifies
LxCLKOUT
back to high only
LxDIR
Link Ports
LxCLKOUT
low. The
and
LxCLK
8-15