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68HC705JB4 데이터시트(PDF) 97 Page - Freescale Semiconductor, Inc |
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68HC705JB4 데이터시트(HTML) 97 Page - Freescale Semiconductor, Inc |
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97 / 134 page ![]() February 24, 1999 GENERAL RELEASE SPECIFICATION MC68HC05JB4 UNIVERSAL SERIAL BUS MODULE MOTOROLA REV 2 10-31 Figure 10-32. IN Token Data Flow for Transmit Endpoint 1/2 Transmit Endpoint Enabled? (USBEN = 1) Transmit Endpoint ready to Transfer? (TX1E = 1) && (TXD1F = 0) & No Response from USB function Send NAK Handshake Set TXD1F to 1 Transmit Endpoint Interrupt Enabled? (TXD1IE = 1) No Interrupt Valid transaction Interrupt generated Transmit Endpoint not Stalled by firmware? (STALL1 & ENDP1) + (STALL2 & ENDP2) Send STALL Handshake Send DATA Data PID set by T1SEQ Valid IN token received for Endpoints 1 or 2 N Y N N Y Y Y ACK received and no Time-out condition occurs? No Response from USB function N Y ((ENDP2 & ENDADD) + (ENDP1 & ENDADD)) ENDP1 is Endpoint 1 directed traffic ENDP2 is Endpoint 2 directed traffic Note: Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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