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USB97C100QFP 数据表(PDF) 20 Page - SMSC Corporation |
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USB97C100QFP 数据表(HTML) 20 Page - SMSC Corporation |
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20 / 64 page  SMSC DS – USB97C100 Page 20 Rev. 01/03/2001 Table 18 – 8051 GP FIFO4 GP_FIFO4 (0x7F16 - RESET=0xXX) 8051 GP FIFO4 BIT NAME R/W DESCRIPTION [7:0] GP_FIFO4 R/W 8 byte deep GP FIFO. This data FIFOs must not be read unless the associated status bit indicates that FIFO is not empty. FIFO Status Registers Table 19 – 8051 GP FIFO 1 STATUS GPFIFO1_STS (0x7F11 – RESET=0x01) 8051 GP FIFO status BIT NAME R/W DESCRIPTION [7:2] Reserved R Reserved 1 GPFIFO1_FULL R GP FIFO 1 full status 0 = Not FULL 1 = FULL 0 GPFIFO1_EMPTY R GP FIFO 1 empty status 0 = Has one or more TX packet 1 = Empty Table 20– 8051 GP FIFO 2 STATUS GPFIFO2_STS (0x7F13 – RESET=0x01) 8051 GP FIFO 2 status BIT NAME R/W DESCRIPTION [7:2] Reserved R Reserved 1 GPFIFO2_FULL R GP FIFO 2 full status 0 = Not FULL 1 = FULL 0 GPFIFO2_EMPTY R GP FIFO 2 empty status 0 = Has one or more TX packet 1 = Empty Table 21 – 8051 GP FIFO 3 STATUS GPFIFO3_STS (0x7F15 – RESET=0x01) 8051 GP FIFO 3 status BIT NAME R/W DESCRIPTION [7:2] Reserved R Reserved 1 GPFIFO3_FULL R GP FIFO 3 full status 0 = Not FULL 1 = FULL 0 GPFIFO3_EMPTY R GP FIFO 3 empty status 0 = Has one or more TX packet 1 = Empty Table 22 – 8051 GP FIFO 4 STATUS GPFIFO4_STS (0x7F17 – RESET=0x01) 8051 GP FIFO status BIT NAME R/W DESCRIPTION [7:2] Reserved R Reserved 1 GPFIFO4_FULL R GP FIFO 4 full status 0 = Not FULL 1 = FULL 0 GPFIFO4_EMPTY R GP FIFO 4 empty status 0 = Has one or more TX packet 1 = Empty |
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