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TUSB2136 数据表(PDF) 25 Page - Texas Instruments |
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TUSB2136 数据表(HTML) 25 Page - Texas Instruments |
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25 / 53 page ![]() 2−12 2.5.2 IEPBCNT_0: Input Endpoint-0 Byte Count Register 7 6 5 4 3 210 NAK RSV RSV RSV C3 C2 C1 C0 R/W R/O R/O R/O R/W R/W R/W R/W BIT NAME RESET FUNCTION 3−0 C[3:0] 0000 Byte count: 0000b ³ Count = 0 L 0111b ³ Count = 7 1000b ³ Count = 8 1001b to 1111b are reserved. (If used, defaults to 8) 6−4 RSV 0 Reserved = 0 7 NAK 1 NAK= 0 Buffer contains a valid packet for host-in transaction. NAK= 1 Buffer is empty (host-in request is NAK). 2.5.3 OEPCNFG_0: Output Endpoint-0 Configuration Register 7 6 5 4 3 210 UBME RSV TOGLE RSV STALL USBIE RSV RSV R/W R/O R/O R/O R/W R/W R/O R/O BIT NAME RESET FUNCTION 1−0 RSV 0 Reserved = 0 2 USBIE 0 USB interrupt enable on transaction completion. Set/clear by MCU. 2 USBIE 0 USBIE = 0 No interrupt USBIE = 1 Interrupt on transaction completion 3 STALL 0 USB stall condition indication. Set/clear by MCU. 3 STALL 0 STALL = 0 No stall STALL = 1 USB stall condition. If set by the MCU, a STALL handshake is initiated and the bit is cleared automatically. 4 RSV 0 Reserved = 0 5 TOGLE 0 USB toggle bit. This bit reflects the toggle sequence bit of DATA0, DATA1. 6 RSV 0 Reserved = 0 7 UBME 0 UBM enable/disable bit. Set/clear by MCU. 7 UBME 0 UBME = 0 UBM cannot use this endpoint. UBME = 1 UBM can use this endpoint. |
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