參數(shù)資料
型號(hào): STPCE1EEBC
廠商: 意法半導(dǎo)體
英文描述: X86 Core General Purpose PC Compatible System - on - Chip
中文描述: x86內(nèi)核兼容的通用計(jì)算機(jī)系統(tǒng)-關(guān)于-芯片
文件頁數(shù): 62/87頁
文件大?。?/td> 1356K
代理商: STPCE1EEBC
DESIGN GUIDELINES
62/87
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
Release 1.3 - January 29, 2002
6.3.3. SDRAM
The STPC provides all the signals for SDRAM
control. Up to 128 MBytes of main memory are
supported. All Banks must be 64 bits wide. Up to 4
memory banks are available when using 16Mbit
devices. Only up to 2 banks can be connected
when using 64Mbit and 128Mbit components due
to the reallocation of CS2# and CS3# signals. This
is described in
Table 6-4
and
Table 6-5
.
Graphics memory resides at the beginning of
Bank 0. Host memory begins at the top of graphics
memory and extends to the top of populated
SDRAM. Bank 0 must always be populated.
Figure 6-4
,
Figure 6-5
and
Figure 6-6
show some
typical implementations.
The purpose of the serial resistors is to reduce
signal oscillation and EMI by filtering line
reflections. The capacitance in
Figure 6-4
has a
filtering effect too, while it is used for propagation
delay compensation in the 2 other figures.
Figure 6-4. One Memory Bank with 4 Chips (16-bit)
CS0#
MA[12:0]
BA[1:0]
RAS0#
CAS0#
WE#
DQM[7:0]
MD[63:0]
MCLKI
MCLKO
DQM[7:6]
MD[63:48]
Reference Knot
DQM[5:4]
MD[47:32]
DQM[3:2]
MD[31:16]
DQM[1:0]
MD[15:0]
MCLKA
MCLKB
MCLKC
MCLKD
10pF
Length(MCLKI) = Length(MCLKy) with y = {A,B,C,D}
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相關(guān)代理商/技術(shù)參數(shù)
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STPCE1HEBC 功能描述:微處理器 - MPU 133MHz x86 SoC RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324