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MSC8101数据手册封面

MSC8101 Datasheet

  • MSC8101

  • Networking Digital Signal Processor

  • 1873.07KB

  • Motorola   Motorola

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Signals/Connections
Table 1-9.
Name
General-
Purpose I/O
PC24
Port C Signals (Continued)
Peripheral Controller:
Dedicated I/O
Protocol
BRG8O
Dedicated
I/O Data
Direction
Output
Description
Baud-Rate Generator 8 Output
The CPM supports up to 8 BRGs used internally by the bank-of-clocks
selection logic and/or to provide an output to one of the 8 BRG pins.
Clock 8
The CPM supports up to 10 clock input pins. The clocks are sent to the
bank-of-clocks selection logic, where they can be routed to the controllers.
Timer Input 3
A timer can have one of the following sources: another timer, system
clock, system clock divided by 16, or a timer input. The CPM supports up
to four timer inputs. The timer inputs can be captured on the rising, falling,
or both edges.
Timer 4: Timer Out 4
The timers (Timer1鈥?]) can output a signal on a timer output (TOUT[1鈥?])
when the reference value is reached. This signal can be an active-low
pulse or a toggle of the current output. The output can also be connected
internally to the input of another timer, resulting in a 32-bit timer.
DMA: Data Request 2
DACK2, DREQ2, DRACK2, and DONE2 belong to the SIU DMA controller.
DONE2 and DRACK2 are signals on the same pin and therefore cannot be
used simultaneously. There are two sets of DMA pins associated with the
PIO ports.
Clock 9
The CPM supports up to 10 clock input pins sent to the bank-of-clocks
selection logic, where they can be routed to the controllers.
DMA: Data Acknowledge 1
DACK1, DREQ1, DRACK1, and DONE1 belong to the SIU DMA controller.
DONE1 and DRACK1 are signals on the same pin and therefore cannot be
used simultaneously. There are two sets of DMA pins associated with the
PIO ports.
External Request 2
External request input line 2 asserts an internal request to the CPM
processor. The signal can be programmed as level- or edge-sensitive, and
also has programmable priority. Refer to the risc controller configuration
register (RCCR) description in the Chapter 17 of the
MSC8101 Reference
Manual
for programming information. There are no current microcode
applications for this request line. It is reserved for future development.
CLK8
Input
TIN3
Input
Timer4: TOUT4
Output
DMA: DREQ2
Input
PC23
CLK9
Input
DMA: DACK1
Output
EXT2
Input
MSC8101 Technical Data, Rev. 16
1-28
Freescale Semiconductor

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