STPCC4 STMicroelectronics, STPCC4 Datasheet - Page 68

• Manufacturer Part Number: STPCC4
• Description: STPC CONSUMER-II DATASHEET - X86 CORE PC COMPATIBLE INFORMATION APPLIANCE SYSTEM-ON-CHIP
• Manufacturer: STMicroelectronics

DESIGN GUIDELINES
For other implementations like 32-bit SDRAM
devices, refers to the SDRAM controller signal
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#, PCI_REQ#[2:0].
68/93
Address Mapping: 16 Mbit - 2 internal banks
STPC I/F
RAS Address A11
CAS Address A11
Address Mapping: 64/128 Mbit - 2 internal banks
STPC I/F
RAS Address A11
CAS Address A11
Address Mapping: 64/128 Mbit - 4 internal banks
STPC I/F
RAS Address A11
CAS Address A11
DIMM Pin Number
SDRAM Density
Internal Banks
123
126
122
...
39
BA0
BA0
BA0
MA12 MA11 MA10 MA9
A24
0
BA1
A12
A12
PCICLKO
PCICLKI
A23
0
MA11 MA10 MA9
A24
0
BA0 (MA11)
MA[10:0]
2 Banks
16 Mbit
Figure 6-7. Typical PCI clock routing
MA10 MA9
A22
0
A22
0
A23
0
-
-
-
0 - 22
Table 6-5. Address Mapping
Release 1.5 - January 29, 2002
Table 6-4. DIMM Pinout
A21
A24
A21
A26
A22
A26
0 - 33pF
10 - 33
MA8
A2
A23
MA8
A20
A25
MA8
A21
A25
BA0 (MA13)
64/128 Mbit
MA[10:0]
2 Banks
MA11
MA12
MA7
A19
A10
MA7
A19
A10
MA7
A20
A10
-
multiplexing and address mapping described in
the following Table 6-4 and Table 6-5.
PCI_CLKO must be connected to PCI_CLKI
through a 10 to 33 Ohms resistor. Figure 6-7
shows a typical implementation.
For more information on layout constraints, go to
the place and route recommendationssection.
PCICLKA
PCICLKB
PCICLKC
MA6
A18
A9
MA6
A18
A9
MA6
A19
A9
MA5
A17
A8
MA5
A17
A8
MA5
A18
A8
64/128 Mbit
BA1 (MA12)
BA0 (MA13)
MA[10:0]
4 Banks
MA11
MA4
A16
A7
MA4
A16
A7
MA4
A17
A7
-
MA3
A15
A6
MA3
A15
A6
MA3
A16
A6
Device A
Device B
Device C
MA2
A14
A5
MA2
A14
A5
MA2
A15
A5
CS2# (MA11)
CS3# (MA12)
CS3# (BA1)
STPC I/F
MA[10:0]
MA1
A13
A4
MA1
A13
A4
MA1
A14
A4
BA0
MA0
A12
A3
MA0
A12
A3
MA0
A13
A3