MSC8113 Freescale Semiconductor / Motorola, MSC8113 Datasheet - Page 25

• Manufacturer Part Number: MSC8113
• Description: Tri-Core Digital Signal Processor
• Manufacturer: Freescale Semiconductor / Motorola

2.5.5.2
Table 17 describes the
For designs that use the
values specified for
2.5.5.3
Table 17 describes the DMA signal timing.
The DREQ
according to the timings in Table 17. Figure 12 shows synchronous peripheral interaction.
Freescale Semiconductor
Notes:
No.
20
21
23
24
No.
37
38
39
40
41
Rise-to-rise skew
Fall-to-fall skew
CLKOUT phase (1.1 V, 133 MHz)
•
•
CLKOUT phase (1.1 V, 100 MHz)
•
•
1.
2.
3.
4.
DREQ set-up time before the 50% level of the falling edge of REFCLK
DREQ hold time after the 50% level of the falling edge of REFCLK
signal is synchronized with
DONE set-up time before the 50% level of the rising edge of REFCLK
DONE hold time after the 50% level of the rising edge of REFCLK
DACK/DRACK/DONE delay after the 50% level of the REFCLK rising edge
Phase high
Phase low
Phase high
Phase low
A positive number indicates that CLKOUT precedes CLKIN, A negative number indicates that CLKOUT follows CLKIN.
Skews are measured in clock mode 29, with a CLKIN:CLKOUT ratio of 1:1. The same skew is valid for all clock modes.
CLKOUT skews are measured using a load of 10 pF.
CLKOUT skews and phase are not measured for 500/166 Mhz parts because these parts only use CLKIN mode.
CLKIN to CLKOUT Skew
DMA Data Transfers
CLKIN
CLKOUT-
CLKOUT
synchronization. Figure 11 shows the relationship between the
MSC8113 Tri-Core Digital Signal Processor Data Sheet, Rev. 0
to-
synchronization mode, use the skew values listed in Table 16 to adjust the rise-to-fall timing
CLKIN
Characteristic
CLKOUT
REFCLK
Figure 11. CLKOUT and CLKIN Signals.
CLKIN
skew timing.
Characteristic
. To achieve fast response, a synchronized peripheral should assert
Table 16. CLKOUT Skew
Table 17. DMA Signals
20
Min
–1.5
0.0
2.2
2.2
3.3
3.3
CLKOUT
1
21
Min
Ref = CLKIN
5.0
0.5
5.0
0.5
0.5
Electrical Characteristics
and
CLKIN
Max
0.95
1.0
—
—
—
—
Max
7.5
—
—
—
—
1
timings.
DREQ
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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