ZL50075GAC ZARLINK [Zarlink Semiconductor Inc], ZL50075GAC Datasheet - Page 37

• Manufacturer Part Number: ZL50075GAC
• Description: 32 K Channel Digital Switch with High Jitter Tolerance, Rate Conversion per Group of 2 Streams (8, 16, 32 or 64 Mbps), and 64 Inputs and 64 Outputs
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

The address ranges for the data memory portion corresponding to each of the actual input streams, STiAn and
STiBn, for any particular input group number is calculated by adding the Start Address for the particular group, as
indicated in Table 17, to the appropriate Address Offset Range, as indicated in Table 18. The time-slots map linearly
into the appropriate address offset range. (i.e., timeslots 0, 1, 2,... map into addresses 00000, 00001, 00002,...)
The entire data memory is a read only structure. Any write attempts will result in a bus error. BERR is driven active
low to terminate the bus cycle.
14.3
14.3.1
The BER Enable Control Memory (IBERECM) is a read/write memory block. Each memory location is used to
control the BER counter of one incoming timeslot. Addressing into each of the streams is illustrated in Table 19.
Each byte location of the BER Enable Memory contains one read/write BER counter enable (BCE) bit, mapped into
the D0 location. If the BCE bit is set, then the BER counter for the corresponding stream and timeslot is enabled for
the duration of that timeslot. If the BCE bit is cleared the counter is disabled.
BER Control Memory and Error Counters
Input BER Enable Control Memory
Group
Input
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
Table 19 - BER Enable Control Memory Group Address Mapping
Address
030C00
031C00
032C00
033C00
030000
030400
030800
031000
031400
031800
032000
032400
032800
033000
033400
033800
(Hex)
Start
030C00 - 030FFF
031C00 - 031FFF
032C00 - 032FFF
033C00 - 033FFF
030000 - 0303FF
030400 - 0307FF
030800 - 030BFF
031000 - 0313FF
031400 - 0317FF
031800 - 031BFF
032000 - 0323FF
032400 - 0327FF
032800 - 032BFF
033000 - 0333FF
033400 - 0337FF
033800 - 033BFF
Address Range
(Hex)
Zarlink Semiconductor Inc.
ZL50075
37
Group
Input
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Address
034C00
035C00
036C00
037C00
034000
034400
034800
035000
035400
035800
036000
036400
036800
037000
037400
037800
(Hex)
Start
034C00 - 034FFF
035C00 - 035FFF
036C00 - 036FFF
037C00 - 037FFF
034800 - 034BFF
035800 - 035BFF
036800 - 036BFF
037800 - 037BFF
034000 - 0343FF
034400 - 0347FF
035000 - 0353FF
035400 - 0357FF
036000 - 0363FF
036400 - 0367FF
037000 - 0373FF
037400 - 0377FF
Address Range
(Hex)
Data Sheet