STPC4EDBC STMICROELECTRONICS [STMicroelectronics], STPC4EDBC Datasheet - Page 66
STPC4EDBC
Manufacturer Part Number
STPC4EDBC
Description
X86 Core PC Compatible Information Appliance System-on-Chip
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.STPC4EDBC.pdf
(93 pages)
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DESIGN GUIDELINES
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
Graphics memory resides at the beginning of
Bank 0. Host memory begins at the top of graphics
66/93
MCLKI
MCLKO
CS0#
MA[12:0]
BA[1:0]
RAS0#
CAS0#
WE#
DQM[7:0]
MD[63:0]
Table 6-4
Figure 6-4. One Memory Bank with 4 Chips (16-bit)
and
10pF
Reference Knot
Table
6-5.
Release 1.5 - January 29, 2002
DQM[7:6]
MD[63:48]
MCLKD
Length(MCLKI) = Length(MCLKy) with y = {A,B,C,D}
memory and extends to the top of populated
SDRAM. Bank 0 must always be populated.
Figure
typical implementations.
The purpose of the serial resistors is to reduce
signal oscillation and EMI by filtering line
reflections. The capacitance in
filtering effect too, while it is used for propagation
delay compensation in the 2 other figures.
6-4,
DQM[5:4]
MD[47:32]
MCLKC
Figure 6-5
DQM[3:2]
MD[31:16]
MCLKB
and
Figure 6-6
Figure 6-4
MCLKA
DQM[1:0]
MD[15:0]
show some
has a
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