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MSC8103/D 数据表(PDF) 32 Page - Freescale Semiconductor, Inc |
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MSC8103/D 数据表(HTML) 32 Page - Freescale Semiconductor, Inc |
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32 / 104 page ![]() MSC8103 Network Digital Signal Processor, Rev. 11 1-28 Freescale Semiconductor Signals/Connections PC24 BRG8O CLK8 TIN3 Timer4: TOUT4 DMA: DREQ2 Output Input Input Output Input 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 (Timer1–4]) can output a signal on a timer output (TOUT[1–4]) 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. PC23 CLK9 DMA: DACK1 EXT2 Input Output Input 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 MSC8103 Reference Manual for programming information. There are no current microcode applications for this request line. It is reserved for future development. Table 1-9. Port C Signals (Continued) Name Dedicated I/O Data Direction Description General- Purpose I/O Peripheral Controller: Dedicated I/O Protocol |
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