参数资料
型号: MSC8103VT1100F
厂商: Freescale Semiconductor
文件页数: 55/104页
文件大小: 0K
描述: IC DSP 16BIT 275MHZ 332-FCPBGA
标准包装: 90
系列: StarCore
类型: SC140 内核
接口: 通信处理器模块(CPM)
时钟速率: 275MHz
非易失内存: 外部
芯片上RAM: 512kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.60V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 332-BFBGA,FCPBGA
供应商设备封装: 332-FCBGA(17x17)
包装: 托盘
MSC8103 Network Digital Signal Processor, Rev. 12
2-14
Freescale Semiconductor
Physical and Electrical Specifications
2.6.5
System Bus Access Timing
2.6.5.1 Core Data Transfers
Generally, all MSC8103 bus and system output signals are driven from the rising edge of the reference clock
(REFCLK), which is DLLIN. Memory controller signals, however, trigger on four points within a DLLIN cycle.
Each cycle is divided by four internal ticks: T1, T2, T3, and T4. T1 always occurs at the rising edge of DLLIN (and
T3 at the falling edge), but the spacing of T2 and T4 depends on the PLL clock ratio selected, as Table 2-15 shows.
Figure 2-9 is a graphical representation of Table 2-15.
Note:
The UPM machine and GPCM machine outputs change on the internal tick determined by the memory
controller programming; the AC specifications are relative to the internal tick. SDRAM machine outputs
change only on the DLLIN rising edge.
Table 2-15.
Tick Spacing for Memory Controller Signals
PLL Clock Ratio
Tick Spacing (T1 Occurs at the Rising Edge of DLLIN)
T2
T3
T4
1:2, 1:3, 1:4, 1:5, 1:6
1/4 DLLIN
1/2 DLLIN
3/4 DLLIN
1:2.5
3/10 DLLIN
1/2 DLLIN
8/10 DLLIN
1:3.5
4/14 DLLIN
1/2 DLLIN
11/14 DLLIN
Figure 2-9.
Internal Tick Spacing for Memory Controller Signals
DLLIN
T1
T2
T3
T4
DLLIN
T1
T2
T3
T4
for 1:2.5
for 1:3.5
DLLIN
T1
T2
T3
T4
for 1:2, 1:3, 1:4, 1:5, 1:6
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