MC68HC908JG16FA MOTOROLA [Motorola, Inc], MC68HC908JG16FA Datasheet - Page 203

• Manufacturer Part Number: MC68HC908JG16FA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

11.9.1.3 Transmit Endpoint 1
MC68HC908JG16
MOTOROLA
—
Rev. 1.0
For an IN transaction directed at endpoint 1, the USB module will
generate an interrupt by setting the TXD1F in the UIR1 register. The
conditions necessary for the interrupt to occur are shown in
Figure
TRANSMIT ENDPOINT READY TO TRANSFER?
(TX1E = 1) AND (TXD1F = 0) AND (UE1TR = 0)
Freescale Semiconductor, Inc.
TRANSMIT ENDPOINT NOT STALLED
TRANSMIT ENDPOINT ENABLED?
TIMEOUT CONDITION OCCURS?
Figure 11-32. IN Token Data Flow for Transmit Endpoint 1
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BY FIRMWARE (STALL1 = 1)?
RECEIVED FOR ENDPOINT 1
USB MODULE ENABLED?
INTERRUPT GENERATED
DATA PID SET BY T1SEQ
ACK RECEIVED AND NO
INTERRUPT ENABLED?
VALID TRANSACTION
TRANSMIT ENDPOINT
11-32.
VALID IN TOKEN
SET TXD1F TO 1
Universal Serial Bus Module (USB)
(ENABLE = 1)
(USBEN = 1)
SEND DATA
(TXD1IE = 1)
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Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
FROM USB FUNCTION
FROM USB FUNCTION
FROM USB FUNCTION
Universal Serial Bus Module (USB)
NO RESPONSE
NO RESPONSE
NO RESPONSE
SEND STALL
HANDSHAKE
HANDSHAKE
SEND NAK
USB Interrupts
Technical Data
NO INTERRUPT
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