Table 6-9 – Intel PXA255 User Manual

Page 205

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Intel® PXA255 Processor Developer’s Manual

6-23

Memory Controller

Use the information below to connect the processor to the SDRAM devices. Some of the
addressing combinations may not apply in SA1111 addressing mode. See

Table 6-10

for a complete

listing of supported addressing combinations and how to connect the PXA255 processor to the
SA1111.

2x13x8x32

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

23 22

‘0’

9

8

7

6

5

4

3

2

2x13x8x16

NOT VALID (illegal addressing combination)

NOT VALID (illegal addressing combination)

2x13x9x32

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

23 22

‘0’

25 9

8

7

6

5

4

3

2

2x13x9x16

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

23 22

‘0’

9

8

7

6

5

4

3

2

1

2x13x10x32

NOT VALID (too big)

NOT VALID (too big)

2x13x10x16 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

23 22

‘0’ 25 9

8

7

6

5

4

3

2

1

2x13x11x32

NOT VALID (too big)

NOT VALID (too big)

2x13x11x16

NOT VALID (too big)

NOT VALID (too big)

Table 6-8. External to Internal Address Mapping for SA-1111 Addressing (Sheet 3 of 3)

# Bits

Bank x

Row x

Col x

Data

External Address pins at SDRAM RAS Time

MA<24:10>

External Address pins at SDRAM CAS Time

MA<24:10>

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

Table 6-9. Pin Mapping to SDRAM Devices with Normal Bank Addressing (Sheet 1 of 3)

# Bits

Bank x

Row x

Col x

Data

Pin mapping to SDRAM devices for Normal Addressing.

MA[24:10] represent the address signals driven from the processor.

MA24 MA23 MA22 MA21 MA20 MA19 MA18 MA17 MA16 MA15 MA14 MA13 MA12 MA11 MA10

1x11x8x32

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x8x16

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x9x32

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x9x16

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x10x32

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x10x16

BA0

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x11x11x32

NOT VALID (illegal addressing combination)

1x11x11x16

NOT VALID (illegal addressing combination)

1x12x8x32

BA0

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x12x8x16

BA0

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

1x12x9x32

BA0

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

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