Copyright © Siemens AG 2016. All rights reserved
177
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
0 = no address shift (ERTEC 200 compatible)
MA(23:0) = HADDR(23:0)
1 = address shift depending on configured
memory datawidth
datawidth = 8 bit : MA(23:0) = HADDR(23:0)
datawidth = 16 bit : MA(23:0) =
HADDR(24:1)
datawidth = 32 bit : MA(23:0) =
HADDR(25:2)
13dt11 reserved_2
0h
r w reserved
15dt14 TRCD
0h
r w
TRCD (RAS to CAS delay)
00 = 2 clocks
01 = 3 clocks
10 = 4 clocks
11 = reserved
18dt16 SDRAM_BL
7h
r w
SDRAM Burst Length
This value is written into SDRAM Mode Regis-
ter.
000 = 1 (32 bit SDRAM interface only)
001 = 2 (16 bit SDRAM interface only)
010 = 4 (not supported)
011 = 8
100-110 = reserved
111 = continuous/full page (recommended)
19
reserved_3
0h
r reserved
23dt20 TRFC
Fh
r w
AUTO REFRESH period (cycle) time
Minimum time between to AUTO REFRESH
commands in clocks
0x0 = reserved
0x1 = 4 clocks
:
0xF = 18 clocks
24
ADB
1h
r w
active data bus
0 = disabled
1 = enabled
25
reserved_4
0h
r w reserved
26
BFODM
0h
r w
BurstflashROM Output Delay Mode
0 = XBF_AVD is delayed with register
clocked by input BurstflashROM clock
1 = XBF_AVD is delayed with delay buffer
27
SODM
0h
r w
Output Delay Mode
0 = outputs are delayed with register clocked
by input SDRAM clock
1 = outputs are delayed with delay buffers
Содержание ERTEC 200P
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