mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 205

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

11.9.1.3 Transmit Endpoint 1
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
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)
TRANSMIT ENDPOINT NOT STALLED
TRANSMIT ENDPOINT ENABLED?
TIMEOUT CONDITION OCCURS?
Figure 11-32. IN Token Data Flow for Transmit Endpoint 1
BY FIRMWARE (STALL1 = 1)?
RECEIVED FOR ENDPOINT 1
INTERRUPT GENERATED
USB MODULE ENABLED?
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)
(TXD1IE = 1)
SEND DATA
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
HANDSHAKE
HANDSHAKE
SEND STALL
SEND NAK
Technical Data
NO INTERRUPT
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