Cypress S6J3200 Series, Manual

Page: 631 / 1355

CHAPTER 21:Ethernet MAC
630 S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
4.4.
DMA Configuration Register (ETHERNETn_dma_config)
Description of DMA Configuration register is shown.
REGISTER_NAME ETHERNETn_dma_config
OFFSET 0x010
ACCESS_SIZE W
MULTIPLE
NUMERIC_TYPE
OTHER
BIT_OFFSET 31 30 29 28 27 26 25 24
BIT_NAME Reserved
dma_addr_
bus_width
tx_bd_exten
ded_mode_
en
rx_bd_exte
nded_mode
_en
Reserved
force_max_
amba_burst
_tx
force_max_
amba_burst
_rx
force_discar
d_on_err
ACCESS_TYPE R0,WX R/W R/W R/W R0,WX R/W R/W0 R/W
PROT_TYPE Wp
INITIAL_VALUE 0 0 0 0 0 0 0 0
BIT_OFFSET 23 22 21 20 19 18 17 16
BIT_NAME rx_buf_size[7:0]
ACCESS_TYPE R/W
PROT_TYPE Wp
INITIAL_VALUE 0xF0
BIT_OFFSET 15 14 13 12 11 10 9 8
BIT_NAME Reserved
tx_pbuf_tcp
_en
tx_pbuf_siz
e
rx_pbuf_size[1:0]
ACCESS_TYPE R0,WX R/W R/W R/W
PROT_TYPE Wp
INITIAL_VALUE 0x0 0 1 0x3
BIT_OFFSET 7 6 5 4 3 2 1 0
BIT_NAME Reserved Reserved amba_burst_length[4:0]
ACCESS_TYPE R0,W0 R0,WX R/W
PROT_TYPE Wp
INITIAL_VALUE 0 0 0x04
[bit31] Reserved
Always read "0". Writing has no effect.
[bit30] dma_addr_bus_width: DMA address bus width
Bit Description
0 32-bit DMA address bus width.
1 Setting not allowed.