[From QnA]WIZ811MJ not sending back an ACK packet
IO Modules
No replies yet. Be the first to reply.
Join the discussion.
IO Modules
No replies yet. Be the first to reply.
Join the discussion.
Share projects and connect with makers.
Joined before the site update? first.
New to WIZnet Makers?
We sent a verification link to your address. Open it to activate your account, then log in.
Accounts from this email provider are reviewed by an administrator after verification. Approval usually takes one business day.
Already have an account?
Enter your email address. If it belongs to an account, we'll send a link to set a new password. Members who joined before the site update use this to set their password.
If an account uses that address, we sent a link to set a new password. The link works once and expires in 30 minutes.
Know your password?
Need an account?
RE: [From QnA]WIZ811MJ not sending back an ACK packet
by wiznetmuseum ·
Dear customer,
Thanks for your interest in wiz811mj and w5100.
Could you please confirm which tx_mem_size and rx_mem_size is correct?
Is this due to the WIZ881MJ not sending back an ACK packet fast enough?
→ If ND/MC is set as ‘1’, ACK packet is transmitted whenever receiving data packet from the peer.
Under normal operation, does the WIZ811MJ send an ACK packet automatically?
->ACK packet is transmitted according to internal Timeout mechanism.
What is the internal Timeout mechanism?
->RTR(Retry Time-value Register) sets the period of timeout.
Value 1 means 100us. The initial value is 2000(0x07D0). That will be set as 200ms.
Ex) For 400ms configuration, set as 4000(0x0FA0)
0x0017 0x0018
0x0F 0xA0
Reference point.
RCR sets the number of re-transmission. If retransmission occurs more than the number recorded in RCR, Timeout Interrupt (TIMEOUT bit of Socket n Interrupt Register(Sn_IR) is set as ‘1’) will occur.
Thank,
WIZnet