MSC8144 Freescale Semiconductor, MSC8144 Datasheet - Page 67

• Manufacturer Part Number: MSC8144
• Description: Quad Core Digital Signal Processor
• Manufacturer: Freescale Semiconductor

Note:
3.3.1
This section discusses the various scenarios that can be used with DDR1 and DDR2 memory.
Note:
3.3.1.1
Freescale Semiconductor
MDQ[0–31]
MDQS[0–3]
MDQS[0–3]
MA[0–15]
MCK[0–2]
MCK[0–2]
MCS[0–1]
MDM[0–3]
MBA[0–2]
MCAS
MCKE[0–1]
MODT[0–1]
MDIC[0–1]
MRAS
MWE
MECC[0–7]
ECC_MDM
ECC_MDQS
ECC_MDQS
MV
V
Note:
DDDDR
REF
2.
3.
4.
5.
V
Direct connections to the supply may yield DC current up to 50mA through the I/O supply that adds to overall power
consumption.
Mandatory use of a pull-up or pull-down resistor it is clearly indicated as “pull-up/pull-down”.
NC indicates “not connected” and means do not connect anything to the pin.
The phrase “in use” indicates a typical pin connection for the required function.
Please see recommendations #1 and #2 as mandatory pull-down or pull-up connection for unused pins in case of
subset interface connection.
For information about unused differential/non-differential pins in DDR1/DDR2 modes (that is, unused negative lines
of strobes in DDR1), please refer to Table 54.
If the DDR controller is not used, disable the internal DDR clock by writing a 1 to the CLK11DIS bit in the System Clock Control
Register (SCCR[CLK!11DIS]). See Chapter 7, Clocks, in the MSC8144 Reference Manual for details.
DD
indicates using a 10 kΩ pull-up resistor (recommended) or a direct connection to the appropriate power supply.
DDR Memory Related Pins
Table 54. Connectivity of DDR Related Pins When the DDR Interface Is Not Used
DDR Interface Is Not Used
Signal Name
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 1
Pin Connection
Hardware Design Considerations
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
67