參數(shù)資料
型號: MC68HC705JB4P
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 128/134頁
文件大?。?/td> 1305K
代理商: MC68HC705JB4P
February 24, 1999
GENERAL RELEASE SPECIFICATION
MC68HC05JB4
UNIVERSAL SERIAL BUS MODULE
MOTOROLA
REV 2
10-27
a SETUP interrupt are shown in Figure 10-30.
10.6.1.2 Transmit Control Endpoint 0
For a Control IN transaction directed at Endpoint 0, the USB module will generate
an interrupt by setting the TXD0F ag in the UIR0 register. The conditions
necessary for the interrupt to occur are shown in the owchart of Figure 10-31.
10.6.1.3 Transmit Endpoint 1 and Transmit Endpoint 2
Transmit Endpoints 1 & 2 share their interrupt ag. For an IN transaction directed
at Endpoint 1 or 2, the USB module will generate an interrupt by setting the
TXD1F ag in the UIR1 register. The conditions necessary for the interrupt to
occur are shown in the owchart of Figure 10-32.
10.6.2 Resume Interrupt
The USB module will generate a USB interrupt if low speed bus activity is
detected after entering the suspend state. A transition of the USB data lines to the
non-idle state (“K” state) while in the suspend mode will set the RESUMF ag in
the UIR1 register. There is no interrupt enable bit for this interrupt source and an
interrupt will be executed if the I bit in the CCR is cleared. A resume interrupt can
only occur while the MC68HC05JB4 is in the suspend mode.
10.6.3 End of Packet Interrupt
The USB module can generate a USB interrupt upon detection of an end of
packet signal (a single ended 0) for low speed devices. Upon detection of an SE0
sequence, the USB module sets the EOPF bit and will generate an interrupt if the
EOPIE bit in the UIR1 register is set.
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