參數(shù)資料
型號(hào): MSC7116VF1000
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC
中文描述: 低成本16位數(shù)字信號(hào)處理器與DDR控制器和10/100 Mbps以太網(wǎng)MAC
文件頁數(shù): 23/56頁
文件大小: 719K
代理商: MSC7116VF1000
Electrical Characteristics
MSC7116 10/100 Mbps Ethernet MAC Data Sheet, Rev. 11
Freescale Semiconductor
23
2.5.2.3
Multiplication Factor Range
The multiplier block output frequency ranges depend on the divided input clock frequency as shown in
Table 10
.
2.5.2.4
Allowed Core Clock Frequency Range
The frequency delivered to the core, extended core, and peripherals depends on the value of the CLKCTRL[RNG] bit as shown
in
Table 11
.
This bit along with the CKSEL determines the frequency range of the core clock.
2.5.2.5
Core Clock Frequency Range When Using DDR Memory
The core clock can also be limited by the frequency range of the DDR devices in the system.
Table 13
summarizes this
restriction.
Table 10. PLLMLTF Ranges
Multiplier Block (Loop) Output Range
Minimum PLLMLTF Value
Maximum PLLMLTF Value
266
[Divided Input Clock
×
(PLLMLTF + 1)]
532 MHz
266/Divided Input Clock
532/Divided Input Clock
Note:
This table results from the allowed range for F
Loop
. The minimum and maximum multiplication factors are dependent on the
frequency of the Divided Input Clock.
Table 11. F
vco
Frequency Ranges
CLKCTRL[RNG] Value
Allowed Range of F
vco
1
266
F
vco
532 MHz
0
133
F
vco
266 MHz
Note:
This table results from the allowed range for F
vco
, which is F
Loop
modified by CLKCTRL[RNG].
Table 12. Resulting Ranges Permitted for the Core Clock
CLKCTRL[CKSEL]
CLKCTRL[RNG]
Resulting
Division
Factor
Allowed Range
of Core Clock
Comments
11
1
1
Reserved
Reserved
11
0
2
133
core clock
266 MHz
Limited by range of PLL
01
1
2
133
core clock
266 MHz
Limited by range of PLL
01
0
4
66.5
core clock
133 MHz
Limited by range of PLL
Note:
This table results from the allowed range for F
OUT
, which depends on clock selected via CLKCTRL[CKSEL].
Table 13. Core Clock Ranges When Using DDR
DDR Type
Allowed Frequency
Range for DDR CK
Corresponding Range
for the Core Clock
Comments
DDR 200 (PC-1600)
83–100 MHz
166
core clock
200 MHz
166
core clock
266 MHz
Core limited to 2
×
maximum DDR frequency
Core limited to 2
×
maximum DDR frequency
DDR 266 (PC-2100)
DDR 333 (PC-2600)
83–133 MHz
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