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ADIN1111CCPZ-R7 数据表(PDF) 58 Page - Analog Devices |
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ADIN1111CCPZ-R7 数据表(HTML) 58 Page - Analog Devices |
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58 / 109 page  Data Sheet ADIN1111 REGISTERS analog.com Rev. A | 58 of 109 Table 64. Bit Descriptions for TX_SPACE Bits Bit Name Description Reset Access [31:14] RESERVED Reserved. 0x0 R [13:0] TX_SPACE Transmit FIFO Space Available in Half Words (16 Bits). This is used by the host software to determine if there is space in the Tx FIFO for a frame. Note that the software can queue 2 frames for transmission and wait for a TX_RDY interrupt, or it can fill the Tx FIFO with multiple frames and use TX_SPACE to determine if there is space for the next frame. Note that an extra 2 words of space are needed per frame in the host TX FIFO to store the frame size and header. For example, if the TX_SPACE is 64, the maximum size frame that can be written is (64 -2) × 2 bytes = 124 bytes. Only used with the generic SPI protocol. 0xFFF R Transmit Threshold Register Address: 0x34, Reset: 0x00000041, Name: TX_THRESH Table 65. Bit Descriptions for TX_THRESH Bits Bit Name Description Reset Access [31:6] RESERVED Reserved. 0x1 R [5:0] HOST_TX_THRESH Host Transmit Start Threshold in Cut Through. When cut through on Tx is enabled (TX_CUT_THRU_EN = 1), this field is used to set the threshold in half words (16 bits) at which frame transmission starts for frames coming from the host. The range of valid values for this field is 1 to 26 half words. 0x1 R/W MAC FIFO Clear Register Address: 0x36, Reset: 0x00000000, Name: FIFO_CLR Table 66. Bit Descriptions for FIFO_CLR Bits Bit Name Description Reset Access [31:2] RESERVED Reserved. 0x0 R 1 MAC_TXF_CLR Clear the Host Transmit FIFO. If a frame is currently being transmitted, the transmission stops and a bad CRC is appended to the frame. 0x0 W 0 MAC_RXF_CLR Clear the Receive FIFOs. Writes to the Rx FIFO resume at the start of the next frame. 0x0 W Scratch Registers Address: 0x37 to 0x3A (Increments of 1), Reset: 0x00000000, Name: SCRATCHn Table 67. Bit Descriptions for SCRATCHn Bits Bit Name Description Reset Access [31:0] SCRATCH_DATA Scratch Data. 0x0 R/W MAC Reset Status Register Address: 0x3B, Reset: 0x00000003, Name: MAC_RST_STATUS If this register returns 0x00000000_00000001 when read, the oscillator clock is active, but the 25 MHz crystal clock is not active. If this register returns 0x00000000_00000003 when read, both the oscillator clock and the 25 MHz crystal clock are active. If this register returns 0x00000000_00000000 (SDO output pad is enabled while CS is low), the SPI follower and MAC core are both still in reset. Only single SPI reads of this register are supported. An SPI burst read must not increment into this register. |
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