MT90812 Mitel Networks Corporation, MT90812 Datasheet - Page 57

• Manufacturer Part Number: MT90812
• Description: Integrated Digital Switch (IDX)
• Manufacturer: Mitel Networks Corporation

Advance Information
Test Register 1 and 2 are at locations 60
22.1
The Address Memory Select register (AMS) selects Data/Connect Memory for read/write operations in
microport multiplexed mode. The AMS register also allows the microport read of specific Data Memory
locations from their lower/upper bytes.
Read/Write Address is: 000
Reset Value is: 00
7-4
2-0
Hex Address
Bit
3
A6-A0
59-5F
62-7F
50
51
52
53
54
55
56
57
58
60
61
Address Memory Select Register (AMS)
(unused)
Memory
Select
Name
UB
H
reserved
reserved
When 1, the next reads of Data Memory locations associated with tones and conference
output are from the upper bytes of these locations. If 0 the reads are from the lower
bytes.
When 000, Local Data Memory is selected for read operation.
When 001, Expansion Data Memory is selected for read operation.
When 010, Local Connection Memory Low is selected for read or write operations.
When 011, Expansion Connection Memory Low is selected for read of write operations.
When 100, Local Connection Memory High is selected for read or write operations.
When 101, Expansion Connection Memory High is selected for read or write operations.
Note: Setting of the memory select bits is required only when operating the
microprocessor port in multiplexed mode.
unused
unused
Name
HLO1
HLO2
HC1
HC2
HC3
HS1
HS2
HS3
HS4
H
-
7
-
6
Table 20 - Control Registers
H
HRA Control 1
HRA Control 2
HRA Control 3
HRA Lock Out 1
HRA Lock Out 2
HRA Status 1
HRA Status 2
HRA Status 3
HRA Status 4
unused(7)
reserved
must be iniitialized to 80
unused(30)
-
and 61
5
--
4
H
respectively. Location 61
UB
3
Description
MS2
Description
2
H
MS1
1
MS0
0
H
must be initialized to 80
MT90812
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