
DS33Z44DK
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2006 Maxim Integrated Products
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SCHEMATICS
The DS33Z44DK schematics are featured in the following pages. As this is a hierarchal schematic some
explanation is in order. The main board is composed of six hierarchal blocks: the processor block, the DS33Z44
block, and four Ethernet blocks inside the DS33Z44 block, which is a nested hierarchy block. Each serial card
(DS21458 and DS3174) consists of a single hierarchy block, which connects to a 140-pin AV bus that snaps into
the mainboard.
All signals inside a hierarchy block are local, with exception for VCC and ground. In-port and out-port connectors are
used to allow signals inside a hierarchy block to become accessible as pins on the hierarchy blocks symbol. From
here, blocks are wired together as if they were ordinary components. The system diagram is shown again below,
with schematic page numbers given for each functional block.
This system contained other hierarchy blocks that are not shown (primarily a single-port serial card and the
DS33Z11 mainboard). Due to this, page numbers will not be continuous and some gaps in numbering will be seen
when referring to the total page count. However, page numbers inside any given hierarchy block will be continuous.
DS33Z44 BLOCK
PAGE 20 SYMBOL
SCHEMATIC
PAGES 22-29
P BLOCK
PAGE 21 SYMBOL
SCHEMATIC
PAGES 38-44
DS33Z44 MAINBOARD TOP LEVEL
PHY SYMBOLS ON
PAGES 26-27
PORT 1 ETHERNET
PHY
SCHEMATIC
PAGES 30-31
PORT 3 ETHERNET
PHY
SCHEMATIC
PAGES 36-37
PORT 2 ETHERNET
PHY
SCHEMATIC
PAGES 32-33
SERIAL
INTERFACE
2X
140
PIN
CONNECTORS
DS21458 RESOURCE CARD
SCHEMATIC
PAGES 46-55
DS3184 RESOURCE CARD
SCHEMATIC
PAGES 56-63