Transmitter Error Detection - Analog Devices ADSP-TS101 TigerSHARC Hardware Reference Manual

Error Detection Mechanisms

Transmitter Error Detection

Two kind of transmitter errors are detected.
• Connectivity check
The transmitter checks the
sion. The pin acts as the acknowledge signal. If the acknowledge
signal is not deasserted for a minimum time period during the
transmission, an error has occurred–the
LSTATx
sheet for specific timing data.
• Time out
If the transmitter's acknowledge signal (
time period of 2048 clock cycles, and the transmitter has data to
transmit, an error has occurred—the
register, and a hardware interrupt is issued.
Receiver Error Detection
Two kinds of receiver errors are detected.
• Checksum
The transmitter creates and sends for a special verification byte on
every transmitted quad-word (if it is enabled). This byte is a check-
sum calculation of all data bytes that have been transmitted. The
byte is sent at the end of every 16-byte (quad-word) transmission.
The receiver compares the transmitted verification byte to the local
verification byte created during data reception. If the two bytes dif-
fer, the
interrupt is issued.
The checksum algorithm is:
8-18
register and a hardware interrupt is issued. Refer to the data
bit is set in the
RER0
pin on every quad transmis-
LxCLKIN
TER0
LxCLKIN
bit is set in the
TER1
register and a hardware
LSTATx
ADSP-TS101 TigerSHARC Processor
bit is set in the
) is deasserted for a
LSTATx
Hardware Reference