参数资料
型号: MSC7112VM800
厂商: Freescale Semiconductor
文件页数: 14/56页
文件大小: 0K
描述: IC DSP PROCESSOR 16BIT 400MAPBGA
标准包装: 90
系列: StarCore
类型: SC1400 内核
接口: 主机接口,I²C,UART
时钟速率: 200MHz
非易失内存: 外部
芯片上RAM: 208kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.20V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 400-LFBGA
供应商设备封装: 400-MAPBGA(17x17)
包装: 托盘
Specifications
MSC7112 Low-Cost 16-bit DSP with DDR Controller Data Sheet, Rev. 11
Freescale Semiconductor
21
2.5.2.1
PLL Multiplier Restrictions
There are two restrictions for correct usage of the PLL block:
The input frequency to the PLL multiplier block (that is, the output of the divider) must be in the range 10.5–19.5 MHz.
The output frequency of the PLL multiplier must be in the range 300-600 MHz.
When programming the PLL for a desired output frequency using the PLLDVF, PLLMLTF, and RNG fields, you must meet
these constraints.
2.5.2.2
Division Factors and Corresponding CLKIN Frequency Range
The value of the PLLDVF field determines the allowable CLKIN frequency range, as shown in Table 10.
2.5.2.3
Multiplication Factor Range
The multiplier block output frequency ranges depend on the input clock frequency as shown in Table 11.
2.5.2.4
Allowed Core Clock Frequency Range
The frequency delivered to the core, extended core, and peripheral depends on the value of the CLKCTRL[RNG] bit as shown
This bit along with the CKSEL determines the frequency range of the core clock.
Table 10. CLKIN Frequency Ranges by Divide Factor Value
PLLDVF
Field Value
Divide
Factor
CLKIN Frequency Range
Comments
0x00
1
10.5 to 19.5 MHz
Pre-Division by 1
0x01
2
21 to 39 MHz
Pre-Division by 2
0x02
3
31.5 to 58.5 MHz
Pre-Division by 3
0x03
4
42 to 78 MHz
Pre-Division by 4
0x04
5
52.5 to 97.5 MHz
Pre-Division by 5
0x05
6
63 to 100 MHz
Pre-Division by 6
0x06
7
73.5 to 100 MHz
Pre-Division by 7
0x07
8
84 to 100 MHz
Pre-Division by 8
0x08
9
94.5 to 100 MHz
Pre-Division by 9
Note:
The maximum CLKIN frequency is 100 MHz. Therefore, the PLLDVF value must be in the range from 1–9.
Table 11. PLLMLTF Ranges
Multiplier Block (Loop) Output Range
Minimum PLLMLTF Value
Maximum PLLMLTF Value
300
≤ [Pre-Divided Clock × (PLLMLTF + 1)] ≤ 600 MHz
300/Pre-Divided Clock
600/Pre-Divided Clock
Note:
This table results from the allowed range for FLoop. The minimum and maximum multiplication factors are dependent on the
frequency of the Pre-Divided Clock.
Table 12. Fvco Frequency Ranges
CLKCTRL[RNG] Value
Allowed Range of Fvco
1
300
≤ Fvco ≤ 600 MHz
0
150
≤ Fvco ≤ 300 MHz
Note:
This table results from the allowed range for Fvco, which is FLoop modified by CLKCTRL[RNG].
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