MFC2000 datasheet(78/426 Pages) ETC

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MFC2000 Multifunctional Peripheral Controller 2000

Hardware Description

4-48

Conexant

100723A

External Interrupts

The optional IRQ13 and IRQ11 external interrupt requests share pins with GPIO9 and GPIO8, respectively, and

these interrupts are enabled by setting the corresponding bits in the IRQ ENABLE registers to 1. These interrupt

enable bits must be set to 0 when using GPIO[9:8] as GPIO to prevent these pins from causing interrupts.

If an external interrupt source is connected to GPIO8 and/or GPIO9, the corresponding GPIO direction control

Dedicated external interrupt pins are provided for an active low modem interrupt (MIRQn). All other external

interrupts (IRQ2, IRQ11, IRQ13, and IRQ16) are programmable to be either active low or high, edge or level

triggered. All external interrupts are resynchronized in the ASIC.

Internal Interrupts

Internal interrupts are provided for the Countach Imaging DSP Bus System (irqcbs), the T.4/T.6 logic (irqt4), the

vertical printer stepper motor (irqvpstep), the scan stepper motor (irqsstep), the parallel IO block (irqpio), USB

interface (irqusb), the 50ms timer1 and timer2 (irqtimer1, irqtimer2), DMA Channel 2 (irqdma2), Bi-level

Resolution Conversion (irqbrc), DMA Channel 10 (irqdma10), Scanner IF (irqvsc), SOPIF (irqsopif ), SASIF

(irqsasif), software interrupt (irqsw), SSIF (irqssif), DMA Channel 5 interrupt (irqdma5), and the SDAA Interface

interrupt (irqsdaa).

MFC2000 数据表(PDF) 78 Page - List of Unclassifed Manufacturers