Sharp ER-A440 Service Manual page 25

3) Down-loading matrix for the sattelite
STATE
EVENT
Satellite checks the terminal No.:If it is correct, satellite
ID-ENQ sends ACK and goes to 1.
If it is not correct, Satellite ignores the ID-ENQ.
ACK
NAK
EOT
TEXT
TIME-UP
Initial
0
Satellite checks the terminal No.:If it is correct, satellite
sends ACK and goes to 1.
If it is not correct, Satellite ignores the ID-ENQ.
—
—
After satellite has received TEXT, goes to 0.
— (Normal end)
Before satellite has received TEXT, ignores the EOT
Satellite checks the text block, if the block is correct,
Satellite sends ACK and goes to 1.
If it is not correct, satellite sends NAK and goes to 2.
—
If transmission cannot be continued, satellite sends EOT
and goes to 0.
(ERROR END)
Satellite sends EOT, and goes to 0.
— (ERROR END)
Time-up is 7 seconds
After sending ACK
1
—
—
After sending NAK
2
—
—
—
Satellite goes to 0.
(ERROR END)
Satellite checks the text block, if the block is correct,
Satellite sends ACK and goes to 1.
If it is not correct, satellite sends NAK and goes to 2.
If transmission cannot be continued, satellite sends EOT
and goes to 0.
(ERROR END)
The host goes to 0.
(ERROR END)
Time-up is 7 seconds