MEDIATEK Ralink MT7620 - Page 221

PGMT7620_V.1.0_040503
Page 221 of 523
MT7620 PROGRAMMING GUIDE
Integrated 802.11n MAC/BBP and 2.4 GHz RF/FEM Router-on-a-Chip
Bits
Type
Name
Description
Initial Value
23
RW
GDM_DROP_256B
GDM Drop 256-Byte Packets
A special mode to drop packets with payload >
256 bytes.
0: Drop packets according to standard Ethernet
frame length limitation.
1: Drop packets with payload >256 bytes
0x0
22
RW
GDM_ICS_EN
IPv4 Header Checksum Check Enable
0: Disable
1: Enable
0x1
21
RW
GDM_TCS_EN
TCP Checksum Check Enable
0: Disable
1: Enable
0x1
20
RW
GDM_UCS_EN
UDP Checksum Check Enable
0: Disable
1: Enable
0x1
19
RW
GDM_JMB_EN
GDM Jumbo Frames Enable
0: Drop received frames if length is great than
1518 (1522 for VLAN frames, and 1526 for
double VLAN frames)
1: Allow receive jumbo frames length up to 2
KB.
0x0
18:17
-
-
Reserved
0x0
16
RW
GDM_STRPCRC
GDM CRC Stripping
Enables GDMA1 automatic Rx CRC stripping.
0: Disable
1: Enable
0x1
15:3
-
-
Reserved
0x0
2:0
RW
GDM_FRC_P
GDMA1 Frames Destination Port
3’d0: Port 0 CPU
3’d1: Port 1 GDM
3'd2 to 6: Reserved
3'd7: Discard
0x7
270. GDM_SHPR_CFG: GDM Output Shaper Configuration (offset: 0x0204)
Bits
Type
Name
Description
Initial Value
31:25
-
-
Reserved
0x0
24
RW
GDM_SHPR_EN
GDM Output Shaper Enable
0: Disable
1: Enable
0x0
23:16
RW
GDM_BK_SIZE
GDM output shaper maximum bucket size (unit:
KB)
0x0
15:14
-
-
Reserved
0x0