Copyright © Siemens AG 2016. All rights reserved
171
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
1 = Byte Enable reflect AHB HSIZE during
read
29dt28 reserved_2
0h
r reserved
30
WAIT_POLARITY
1h
r w
WAIT input polarity
0 = low active
1 = high active
31
reserved_1
0h
r reserved
Register:
SDRAM_CONFIG
Address:
8h
Bits:
31dt0
Reset value:
00002020h
Attributes: r (w)(t)(p)
Description:
SDRAM Configuration register
A write on this register starts a Load Mode Register sequence. This
register can only be written after the SDRAM Initialization sequence is
done (Bit 29 of register SDRAM_REFRESH).
Bit
Identifier
Reset Attr.
Function / Description
2dt0 PAGE_SIZE
0h
r w
Page Size
000 = 8 Column address lines
001 = 9 Column address lines
010 = 10 Column address lines
011 = 11 Column address lines
100-111 = reserved
3
reserved_1
0h
r w reserved
6dt4 SDRAM_BANKS
2h
r w
Number of banks inside SDRAM
000 = 1 Bank
001 = 2 Bank
010 = 4 Bank
011-111 = reserved
7
reserved_2
0h
r w reserved
10dt8 ROW_SIZE
0h
r wpt
Row Size
000 = 8 Row address lines
001 = 9 Row address lines
010 = 10 Row address lines
011 = 11 Row address lines
100 = 12 Row address lines
101 = 13 Row address lines
110 = 14 Row address lines
111 = 15 Row address lines
Write protected as long as bit29 in
SDRAM_REFRESH = 0.
A write starts a Mode Register Set to external
SDRAM.
12dt11 reserved_3
0h
r reserved
