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MEC1632 датащи(PDF) 86 Page - Microchip Technology

номер детали MEC1632
подробное описание детали  Low Power 32-Bit Mobile Embedded Controller
PDF  636 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1632 датащи(HTML) 86 Page - Microchip Technology

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MEC1632
DS00001592B-page 86
 2012-2018 Microchip Technology Inc.
6.8
Using Serial Interrupts
The MEC1632 will support the serial interrupt scheme, which is adopted by several companies, to transmit interrupt
information to the system. The serial interrupt scheme adheres to the Serial IRQ Specification for PCI Systems Version
6.0
.
TIMING DIAGRAMS for IRQSER CYCLE
PCICLK = 33 MHz_IN pin
IRQSER = SIRQ pin
Start Frame timing with source sampled a low pulse on IRQ1
Start Frame pulse can be 4-8 clocks wide.
Stop Frame Timing with Host using 17 IRQSER sampling period
Stop pulse is two clocks wide for Quiet mode, three clocks wide for Continuous mode.
There may be none, one, or more Idle states during the Stop Frame.
The next IRQSER cycle’s Start Frame pulse may or may not start immediately after the turn-around clock of the Stop
Frame.
FIGURE 6-5:
SERIAL INTERRUPTS WAVEFORM “START FRAME”
H=Host Control
SL=Slave Control
R=Recovery
T=Turn-around
S=Sample
FIGURE 6-6:
SERIAL INTERRUPT WAVEFORM “STOP FRAME”
H=Host Control
R=Recovery
T=Turn-around
S=Sample
I= Idle
RT
S
R
T
S
IRQSER
PCICLK
Host Controller
IRQ1
IRQ1
Drive Source
RT
None
IRQ0 FRAME IRQ1 FRAME
SR
T
IRQ2 FRAME
None
START
START FRAME
H
SL
or
H
1
SR
T
S
IRQSER
PCICLK
Host Controller
IRQ15
Driver
RT
None
IRQ14
IRQ15
SR
T
IOCHCK#
None
STOP
RT
STOP FRAME
H
I
START
NEXT CYCLE
1
2
3
FRAME
FRAME
FRAME



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