6.1 Address Assignment of EMIF Registers
The EMIF registers are
32 bits in width
. These registers can only be written to with double words.
EMIF
(Base Address 0x7000_0000)
Register Name
Offset Address
Address Area
Access
Default
Description
Revision_Code_and
_Status
0x0000
4 bytes
R
0x00000100
Revision code and status register
Async_Wait_Cycle
_Config
0x0004
4 bytes
W/R
0x40000080
Async wait cycle config register
SDRAM_Bank_
Config
0x0008
4 bytes
W/R
0x000020A0
SDRAM bank config register
SDRAM_Refresh
_Control
0x000C 4
bytes
W/R
0x00000190
Setting of refresh rate
Indication for timeout
Async_BANK0_
Config
0x0010 4
bytes
W/R
0x3FFFFFF2
Timing/data bus width for access
via async. interface CS_PER0_N
Async_BANK1_
Config
0x0014 4
bytes
W/R
0x3FFFFFF2
Timing/data bus width for access
via async. interface CS_PER1_N
Async_BANK2_
Config
0x0018 4
bytes
W/R
0x3FFFFFF2
Timing/data bus width for access
via async. interface CS_PER2_N
Async_BANK3_
Config
0x001C 4
bytes
W/R
0x3FFFFFF2
Timing/data bus width for access
via async. interface CS_PER3_N
Extended_Config
0x0020
4 bytes
W/R
0x03030000
Setting of additional functionalities
Table 19: Overview of EMIF Registers
6.2 EMIF Register Description
Revision Code and Status
R
Addr.: 0x7000_0000 Default: 0x0000_0100
Description
Revision code and status register
Bit No.
Name
Description
31..16 Reserved
Reserved
15..8 MAJOR_REVISION
01h
7..0 MINOR_REVISION
00h
Async wait cycle config
W/R
Addr.: 0x7000_0004 Default: 0x4000_0080
Description Async
wait
cycle config register
Bit No.
Name
Description
31 Reserved
Reserved
30 WP
Wait
polarity
0: Wait if RDY_PER_N = 0
1: Wait if RDY_PER_N = 1
29..8 Reserved
Reserved
7..0
MAX_EXT_WAIT
This value multiplied by 16 is equivalent to the number of AHB clock cycles
that the async. controller waits for RDY_PER_N before access is terminated
with timeout IRQ.
Copyright © Siemens AG 2007. All rights reserved.
70
ERTEC 200 Manual
Technical data subject to change
Version 1.1.0