MT90820 Mitel Networks Corporation, MT90820 Datasheet - Page 8

• Manufacturer Part Number: MT90820
• Description: CMOS ST-BUS FAMILY Large Digital Switch (LDX)
• Manufacturer: Mitel Networks Corporation

MT90820
2-186
Note 1: The bit A7 must be retained HIGH for accesses to Data and Connection Memory positions.
Note*: Channel 0 to 31 are used in 2Meg mode.
Note**: Channel 0 to 63 are used in 4Meg mode.
Note***: Channel 0 to 127 are used in 8Meg mode.
A7
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
The bit A7 must be retained LOW for accesses to Registers.
A6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
A5
CMOS
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
1
1
.
Table 2 - Internal Register and Address Memory Mapping
A4
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
.
.
.
A3
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
.
.
.
A2
0
0
0
0
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
.
.
.
A1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
.
.
.
A0
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
.
.
.
Control Register, CAR.
Interface Mode Selection register, IMS
Frame Alignment register, FAR
Frame Input Offset register 0, FOS0
Frame Input Offset register 1, FOS1
Frame Input Offset register 2, FOS2
Frame Input Offset register 3, FOS3
Ch 0*
Ch 1*
.
Ch 30*
Ch 31*
Ch 32**
Ch 33**
.
Ch 62**
Ch 63**
Ch 64***
Ch 65***
.
Ch 126***
Ch 127***
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