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STPCI2GDY Datasheet(PDF) 81 Page - STMicroelectronics

Part No. STPCI2GDY
Description  X86 Core PC Compatible System-on-Chip for Terminals
Download  111 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPCI2GDY Datasheet(HTML) 81 Page - STMicroelectronics

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DESIGN GUIDELINES
Issue 1.0 - July 24, 2002
81/111
For other implementations like 32-bit SDRAM
devices, refers to the SDRAM controller signal
multiplexing and address mapping described in
the following Table 6-4 and Table 6-5.
6.3.4. PCI BUS
The PCI bus is always active and the following
control signals must be pulled-up to 3.3V or 5V
through 2K2 resistors even if this bus is not
connected to an external device: FRAME#,
TRDY#, IRDY#, STOP#, DEVSEL#, LOCK#,
SERR#, PERR#, PCI_REQ#[2:0].
PCI_CLKO must be connected to PCI_CLKI
through a 10 to 33 Ohms resistor. Figure 6-8
shows a typical implementation.
For more information on layout constraints, go to
the place and route recommendations section.
Table 6-4. DIMM Pinout
SDRAM Density
16 Mbit
64/128 Mbit
64/128 Mbit
STPC I/F
Internal Banks
2 Banks
2 Banks
4 Banks
DIMM Pin Number
...
MA[10:0]
MA[10:0]
MA[10:0]
MA[10:0]
123
-
MA11
MA11
CS2# (MA11)
126
-
MA12
-
CS3# (MA12)
39
-
-
BA1 (MA12)
CS3# (BA1)
122
BA0 (MA11)
BA0 (MA13)
BA0 (MA13)
BA0
Table 6-5. Address Mapping
Address Mapping: 16 Mbit - 2 internal banks
STPC I/F
BA0
MA10 MA9
MA8
MA7
MA6
MA5
MA4
MA3
MA2
MA1
MA0
RAS Address
A11
A22
A21
A2
A19
A18
A17
A16
A15
A14
A13
A12
CAS Address
A11
0
A24
A23
A10
A9
A8
A7
A6
A5
A4
A3
Address Mapping: 64/128 Mbit - 2 internal banks
STPC I/F
BA0
MA12 MA11 MA10 MA9
MA8
MA7
MA6
MA5
MA4
MA3
MA2
MA1
MA0
RAS Address
A11
A24
A23
A22
A21
A20
A19
A18
A17
A16
A15
A14
A13
A12
CAS Address
A11
0
0
0
A26
A25
A10
A9A8A7A6A5A4A3
Address Mapping: 64/128 Mbit - 4 internal banks
STPC I/F
BA0
BA1
MA11 MA10 MA9
MA8
MA7
MA6
MA5
MA4
MA3
MA2
MA1
MA0
RAS Address
A11
A12
A24
A23
A22
A21
A20
A19
A18
A17
A16
A15
A14
A13
CAS Address
A11
A12
0
0
A26
A25
A10
A9
A8
A7
A6
A5
A4
A3
Figure 6-8. Typical PCI clock routing
PCICLKI
PCICLKO
PCICLKA
PCICLKB
PCICLKC
0 - 22
10 - 33
Device A
Device B
Device C
0 - 33pF


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