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HC705JB2GRS/H Datasheet(PDF) 100 Page - NXP Semiconductors |
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HC705JB2GRS/H Datasheet(HTML) 100 Page - NXP Semiconductors |
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100 / 128 page  GENERAL RELEASE SPECIFICATION August 28, 1998 UNIVERSAL SERIAL BUS MODULE MC68HC705JB2 10-32 REV 1.1 Figure 10-32. IN Token Data Flow for Transmit Endpoint 1/ Endpoint 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 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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