1 smrom memory options – Intel PXA26X User Manual
Page 225
Intel® PXA26x Processor Family Developer’s Manual
6-35
Memory Controller
6.7.1.1
SMROM Memory Options
shows the possible external-to-internal address multiplexing options. For SMROM,
there are no bank-address bits, but the corresponding bits are put on the external address bus. The
number of banks per device always defaults to four.
1:0
SXEN0
ENABLE BITS FOR SX MEMORY PARTITION 0 (bit 0) AND PARTITION 1 (bit 1):
0 – Partition is not Enabled as SX Memory
1 – Partition is Enabled as SX Memory
For reset values, see
Table 6-14. SXCNFG Register Bitmap (Sheet 6 of 6)
4800 001C
SXCNFG
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
R
eser
ved
S
X
LA
TC
H
2
SXTP
2
SX
C
A
2
SX
R
A
2
SXR
L2
SXC
L2
S
XEN
2
R
eser
ved
S
X
LA
TC
H
0
SXTP
0
SX
C
A
0
SX
R
A
0
SXR
L0
SXC
L0
S
XEN
0
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
0
*
Bits
Name
Description
Table 6-16. Synchronous Static Memory External to Internal Address Mapping Options (Sheet
1 of 2)
# Bits
Bank x
Row x
Col x
Data
External Address pins at SXMEM RAS Time
MA<24:10>
External Address pins at SXMEM 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
2x12x7x32
22 21 20 19 18 17 16 15 14 13 12 11 10 9
22 21
0
8
7
6
5
4
3
2
2x12x7x16
21 20 19 18 17 16 15 14 13 12 11 10 9
8
21 20
0
7
6
5
4
3
2
1
2x12x8x32
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
2x12x8x16
22 21 20 19 18 17 16 15 14 13 12 11 10 9
22 21
0
8
7
6
5
4
3
2
1
2x12x9x32
24 23 22 21 20 19 18 17 16 15 14 13 12 11
24 23
0
10 9
8
7
6
5
4
3
2
2x12x9x16
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
2x12x10x32
25 24 23 22 21 20 19 18 17 16 15 14 13 12
25 24
0 11 10 9
8
7
6
5
4
3
2
2x12x10x16
24 23 22 21 20 19 18 17 16 15 14 13 12 11
24 23
0 10 9
8
7
6
5
4
3
2
1
2x13x7x32
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 23 22
0
8
7
6
5
4
3
2
2x13x7x16
22 21 20 19 18 17 16 15 14 13 12 11 10 9
8 22 21
0
7
6
5
4
3
2
1
2x13x8x32
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 24 23
0
9
8
7
6
5
4
3
2
2x13x8x16
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 23 22
0
8
7
6
5
4
3
2
1