NO:
W90P710 Programming Guide
VERSION:
2.1
PAGE:
52
The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed,
distributed or reproduced without permission from Winbond.
Table No.: 1200-0003-07-A
4.4.4 Control Frames
4.4.4.1 Receive Control Pause Frame
1. sdklfn
2.
3. Set ACP bit in MCMDR
4. The Multicast address “01-80-c2-00-00-01” should fill to CAM if AMP not set
5. Set EnCFR in MIEN if want to handle control frame receive interrupt
4.4.4.2 Send Control Pause Frame
1. Fill the destination MAC address to CAM#13
2. Fill the source MAC address to CAM#14
3. Fill length/type(0x8808), opcode(0x0001) and operand(timeslot) to CAM#15
4. Set SDPZ bit in MCMDR
5. Wait control pause frame transmission complete by reading SDPZ bit until it is 0
4.4.5 Packet Processing
4.4.5.1 Packet Transmission
(1) Get Tx buffer descriptor from Tx software pointer.
(2) Check ownership of (1), do nothing if ownership is DMA.
(3) Allocate data buffer and set start address to data buffer starting address field of (1).
(4) Copy packet data to data buffer.
(5) Set I,C,P bits if need.
(6) Set packet length to frame length field of (1).
(7) Set ownership to DMA.
(8) Set TXON bit of MCMDR register if it is not set.
(9) Write TSDR register.
