參數(shù)資料
型號: MT90500AL
廠商: Mitel Networks Corporation
英文描述: Multi-Channel ATM AAL1 SAR
中文描述: 多通道自動柜員機AAL1特區(qū)
文件頁數(shù): 86/159頁
文件大?。?/td> 514K
代理商: MT90500AL
MT90500
86
Table 16 - Memory Configuration Register
Address: 0040 (Hex)
Label: MEMCNF
Reset Value: 0008 (Hex)
Label
Bit
Position
Type
Description
ADDMODE
1:0
R/W
Addressing Mode. Indicates the number of address lines connected to the external
memory and therefore the size of the memory chip(s). “00”=32K (MEM_ADD[14:0]);
“01”=64K
(MEM_ADD[15:0]);
“10”=128K
(MEM_ADD[17:0]).
(MEM_ADD[16:0]);
“11”=256K
CPBANK
2
R/W
External Memory Chips per Bank. Indicates the number of external memory devices used
in one memory bank. ‘0’=1 x 32 (36)-bit chip; ‘1’=2 x 16 (18)-bit chips.
READLEN
5:3
R/W
Read Length. Indicates the number of clock cycles between an address and its read data.
“001”=1 clock cycle (used with “Synchronous Burst RAMs”); “010”=2 clock cycles (used
with “Pipeline Synchronous Burst RAMs”); “100”=3 clock cycles; all other values are
reserved. Writing a reserved value in this register may have adverse effects on the
MT90500 and the external memories.
RWTA
6
R/W
Read/Write Turn Around Cycles. ‘0’=Disabled; ‘1’=Enabled.
RRTA
7
R/W
Read Bank1 / Read Bank2 Turn Around Cycles. ‘0’=Disabled; ‘1’=Enabled.
8
R/W
9
R/W
10
R/W
Reserved
15:8
R/W
Reserved. These bits must always be “0000_0000” during operation.
For further details on memory configuration, see Section 4.2, “External Memory Controller,” on page 38.
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