39.114 GMAC Receive Buffer Size Register Priority Queue x
| Name: | GMAC_RBSRPQx |
| Offset: | 0x04A0 + (x-1)*0x04 [x=1..2] |
| Reset: | 0x00000002 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| RBS[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
Bits 7:0 – RBS[7:0] Receive Buffer Size
DMA receive buffer size in system memory. The value defined by these bits determines the size of buffer to use in main system memory when writing received data.
The value is defined in multiples of 64 bytes such that a value of 0x01 corresponds to buffers of 64 bytes, 0x02 corresponds to 128 bytes etc.
For example:
0x02: 128 bytes
0x18: 1536 bytes (1 × max length frame/buffer)
0xA0: 10240 bytes (1 × 10K jumbo frame/buffer)
Note that this value should never be written as zero.