MSC8122 Freescale Semiconductor, MSC8122 Datasheet - Page 18

• Manufacturer Part Number: MSC8122
• Description: Quad Digital Signal Processor
• Manufacturer: Freescale Semiconductor

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Electrical Characteristics
In all cases, the power-up sequence must follow the guidelines shown in Figure 8.
The following rules apply:
2.5.3
The following sections include a description of clock signal characteristics. Table 7 shows the maximum frequency values for
internal (Core, Reference, Bus, and DSI) and external (
frequency values are not exceeded.
18
Core frequency
Reference frequency (REFCLK)
Internal bus frequency (BLCK)
DSI clock frequency (HCLKIN)
•
•
External clock frequency (CLKIN or CLKOUT)
CLKIN frequency
BCLK frequency
Reference clock (REFCLK) frequency
Output clock (CLKOUT) frequency
SC140 core clock frequency
Note:
Core frequency = 300 MHz
Core frequency = 400/500 MHz
1.
2.
3.3 V
1.2 V
During time interval A,
The duration of interval A should be kept below 10 ms.
The duration of timing interval B should be kept as small as possible and less than 10 ms.
V
The rise and fall time of external clocks should be 3 ns maximum
Characteristics
Clock and Timing Signals
Characteristic
Figure 8. Power-Up Sequence for V
MSC8122 Quad Digital Signal Processor Data Sheet, Rev. 15
V
A
DDH
should always be equal to or less than the
Symbol
F
F
F
F
Table 7. Maximum Frequencies
F
CLKOUT
REFCLK
CLKIN
CORE
BCLK
Table 8. Clock Frequencies
B
CLKIN
300 MHz Device
Min
200
20
40
40
40
and
V
CLKOUT
DD
Max
100
100
100
100
300
/V
DDH
CCSYN
V
HCLKIN ≤ (min{100 MHz, CLKOUT})
HCLKIN ≤ (min{70 MHz, CLKOUT})
DDH
) clocks. The user must ensure that maximum
and V
(IO)
Maximum in MHz
V
400 MHz Device
Min
200
DD
20
40
40
40
DD
300/400/500
100/133/166
100/133/166
100/133/166
/
V
/V
CCSYN
CCSYN
133.3
133.3
133.3
133.3
Max
400
voltage level.
Freescale Semiconductor
500 MHz Device
Min
200
20
40
40
40
t (time)
166.7
166.7
166.7
166.7
Max
500