afbr-79q4ekz Avago Technologies, afbr-79q4ekz Datasheet - Page 19

• Manufacturer Part Number: afbr-79q4ekz
• Description: 40 Gigabit Ethernet 40gbase-sr4 Qsfp+ Pluggable, Parallel Fiber-optics Module
• Manufacturer: Avago Technologies

Memory Map
The memory is structured as a single address, multiple page approach. The address is given as A0xh. The structure of
the memory is shown in Figure 17. The memory space is arranged into a lower, single page, address space of 128 bytes
and multiple upper address space pages of 128 bytes each. This structure permits timely access to addresses in the
lower page, e.g. Interrupt Flags and Monitors. Less time critical entries, e.g. serial ID information and threshold settings
are available with the Page Select function. For a more detailed description of the QSFP+ memory map see the QSFP+
SFF-8436 Specification or the Avago Technologies QSFP+ Memory Map document.
For product information and a complete list of distributors, please go to our web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2010 Avago Technologies. All rights reserved.
AV02-2507EN - November 18, 2010
Figure 17. Two-Wire Serial Address A0xh Page Structure
128
191
192
223
224
255
Page 00
Vendor Speci- c ID
Base ID Fields
Extended ID
(64 Bytes)
(32 Bytes)
(32 Bytes)
2-wire serial address, 1010000x (A0h)"
100
106
107
118
119
122
123
126
127
127
128
128
129
129
130
131
132
133
254
255
21
22
33
34
81
82
85
86
97
98
99
0
2
3
Page 01 (Optional)
AST Table Length (TL)
Entry Area (Optional)
Password Change
Channel Monitors
Application Code
Application Code
Application Code
Module Monitors
Page Select Byte
Password Entry
Area (Optional)
Interrupt Flags
Channel Mask
other entries
ID and status
Module and
Reserved
Reserved
Reserved
CC_APPS
Entry TL
Control
Entry 0
Entry 1
(1 Bytes)
(1 Bytes)
(2 Bytes)
(2 Bytes)
(2 Bytes)
(3 Bytes)
(19 Bytes)
(12 Bytes)
(48 Bytes)
(4 Bytes)
(12 Bytes)
(2 Bytes)
(7 Bytes)
(12 Bytes)
(4 Bytes)
(4 Bytes)
(1 Bytes)
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128
255
Page 02 (Optional)
User EEPROM Data
(128 Bytes)
128
175
176
223
224
225
226
241
242
253
254
255
Page 03
Channel Threshold
Module Threshold
Channel Monitor
Channel Controls
Vendor Speci- c
Reserved
Reserved
Masks
(48 Bytes)
(48 Bytes)
(2 Bytes)
(16 Bytes)
(12 Bytes)
(2 Bytes)