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R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
12345 2004 REV.1.10 4-6
Start Frame timing with source sampled a low pulse on IRQ1
RTSRTS
IRQSER
PCICLK
Host ControllerIRQ1 IRQ1
Drive Source
RT
None
IRQ0 FRAME IRQ1 FRAME
S RT
IRQ2 FRAME
None
START
START FRAME
H
SL
or
H
1
1. Start Frame pulse can be 4-8 clocks wide.
Stop Frame Timing with Host using 17 IRQSER sampling period
S RTS
IRQSER
PCICLK
Host ControllerIRQ15
Drive
r
RT
None
IRQ14 IRQ15
S RT
IOCHCK#
None
STOP
RT
STOP FRAME
H
I
START
NEXT CYCLE
1
2
3
FRAMEFRAMEFRAME
H=Host, SL=Slave Control, R=Recovery, T=Turn-around, S=Sample
1. Stop Pulse is 2 clocks wide for Quiet mode, and 3 clocks wide for Continuous mode.
2. There may be none, one or more Idle states during the Stop Frame.
3. The next IRQSER cycle’s Start Frame pulse may or may not start immediately after the turn-around
clock of the Stop Frame.
IRQSER Sampling Periods
IRQ/Data Frame Signal Sampled # of clocks past Start
1 IRQ0 2
2 IRQ1 5
3 SMI# 8
4 IRQ3 11
5 IRQ4 14
6 IRQ5 17
7 IRQ6 20
8 IRQ7 23
9 IRQ8 26
10 IRQ9 29
11 IRQ10 32
12 IRQ11 35
13 IRQ12 38
14 IRQ13 41
15 IRQ14 44
16 IRQ15 47
17 IOCHCK# 50
18 INTA# 53
19 INTB# 56
20 INTC# 59
21 INTD# 62
32:22 Unassigned 95