MC68HC908JG16FA MOTOROLA [Motorola, Inc], MC68HC908JG16FA Datasheet - Page 200

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

Universal Serial Bus Module (USB)
11.9.1.1 Receive Control Endpoint 0
Technical Data
200
For a control OUT transaction directed at endpoint 0, the USB module
will generate an interrupt by setting the RXD0F flag in the UIR0 register.
The conditions necessary for the interrupt to occur are shown in the
flowchart in
ENDPOINT 0 RECEIVE READY TO RECEIVE?
ENDPOINT 0 RECEIVE NOT STALLED?
Freescale Semiconductor, Inc.
Figure 11-29. OUT Token Data Flow for Receive Endpoint 0
RECEIVE CONTROL ENDPOINT
RECEIVED FOR ENDPOINT 0?
ERROR FREE DATA PACKET?
For More Information On This Product,
RECEIVED FOR ENDPOINT 0
(RX0E = 1) AND (RXD0F = 0)
USB MODULE ENABLED?
INTERRUPT GENERATED
INTERRUPT ENABLED?
SET/CLEAR R0SEQ BIT
VALID TRANSACTION
VALID DATA TOKEN
VALID OUT TOKEN
SET RXD0F TO 1
Universal Serial Bus Module (USB)
ACCEPT DATA
(OSTALL0 = 0)
(RXD0IE = 1)
(USBEN = 1)
Figure
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Y
Y
Y
Y
Y
Y
Y
11-29.
N
N
N
N
N
N
IGNORE TRANSACTION
FROM USB FUNCTION
FROM USB FUNCTION
NO RESPONSE FROM
USB FUNCTION
NO RESPONSE
NO RESPONSE
SEND STALL
HANDSHAKE
HANDSHAKE
SEND NAK
TIMEOUT
MC68HC908JG16
NO INTERRUPT
MOTOROLA
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Rev. 1.0