ST STM32F40 Series Reference Manual page 1016

RM0090
Ethernet DMA current host transmit descriptor register (ETH_DMACHTDR)
Address offset: 0x1048
Reset value: 0x0000 0000
The Current host transmit descriptor register points to the start address of the current
transmit descriptor read by the DMA.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
r r r r r r r
Bits 31:0 HTDAP: Host transmit descriptor address pointer
Ethernet DMA current host receive descriptor register (ETH_DMACHRDR)
Address offset: 0x104C
Reset value: 0x0000 0000
The Current host receive descriptor register points to the start address of the current receive
descriptor read by the DMA.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
r r r r r r r
Bits 31:0 HRDAP: Host receive descriptor address pointer
Cleared on Reset. Pointer updated by DMA during operation.
Ethernet DMA current host transmit buffer address register
(ETH_DMACHTBAR)
Address offset: 0x1050
Reset value: 0x0000 0000
The Current host transmit buffer address register points to the current transmit buffer
address being read by the DMA.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
r r r r r r r
Bits 31:0 HTBAP: Host transmit buffer address pointer
Ethernet (ETH): media access control (MAC) with DMA controller
r r r r r r
Cleared on reset. Pointer updated by DMA during operation.
r r r r r r
r r r r r r
Cleared on reset. Pointer updated by DMA during operation.
Doc ID 018909 Rev 4
HTDAP
r r r r r r r
HRDAP
r r r r r r r
HTBAP
r r r r r r r
9 8 7 6 5
r r r r r r r
9 8 7 6 5
r r r r r r r
9 8 7 6 5
r r r r r r r
4 3 2 1 0
r r r r r
4 3 2 1 0
r r r r r
4 3 2 1 0
r r r r r
1016/1422