參數(shù)資料
型號: KMC8112TVT2400V
廠商: Freescale Semiconductor
文件頁數(shù): 30/44頁
文件大?。?/td> 0K
描述: IC DSP 300MHZ 431FCPBGA
標準包裝: 2
系列: StarCore
類型: SC140 內(nèi)核
接口: 以太網(wǎng),I²C,TDM,UART
時鐘速率: 300MHz
非易失內(nèi)存: 外部
芯片上RAM: 448kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.10V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 431-BFBGA,F(xiàn)CBGA
供應(yīng)商設(shè)備封裝: 431-FCPBGA(20x20)
包裝: 托盤
MSC8112 Dual Core Digital Signal Processor Data Sheet, Rev. 1
Freescale Semiconductor
36
3
Hardware Design Considerations
The following sections discuss areas to consider when the MSC8112 device is designed into a system.
3.1
Use the following guidelines for start-up and power-down sequences:
Assert PORESET and TRST before applying power and keep the signals driven low until the power reaches the
required minimum power levels. This can be implemented via weak pull-down resistors.
CLKIN
can be held low or allowed to toggle during the beginning of the power-up sequence. However, CLKIN must
start toggling before the deassertion of PORESET and after both power supplies have reached nominal voltage levels.
If possible, bring up VDD/VCCSYN and VDDH together. If it is not possible, raise VDD/VCCSYN first and then bring up
VDDH. VDDH should not exceed VDD/VCCSYN until VDD/VCCSYN reaches its nominal voltage level. Similarly, bring both
voltage levels down together. If that is not possible reverse the power-up sequence, with VDDH going down first and
then VDD/VCCSYN.
Note:
This recommended power sequencing for the MSC8112 is different from the MSC8102. See Section 2.5.2 for
start-up timing specifications.
External voltage applied to any input line must not exceed the I/O supply VDDH by more than 0.8 V at any time, including during
power-up. Some designs require pull-up voltages applied to selected input lines during power-up for configuration purposes.
This is an acceptable exception to the rule. However, each such input can draw up to 80 mA per input pin per device in the
system during start-up.
Figure 31. Test Access Port Timing Diagram
Figure 32. TRST Timing Diagram
TCK
(Input)
TDI
(Input)
TDO
(Output)
TDO
(Output)
VIH
VIL
Input Data Valid
Output Data Valid
TMS
708
709
710
711
TCK
(Input)
TRST
(Input)
713
712
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