KU82596CA33 S N222 Intel, KU82596CA33 S N222 Datasheet - Page 28

• Manufacturer Part Number: KU82596CA33 S N222
• Manufacturer: Intel

Specifications of KU82596CA33 S N222

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Mounting: Surface Mount
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

SYSTEM CONTROL BLOCK (SCB)
The SCB is a memory block that plays a major role in communications between the CPU and the 82596 Such
communications include the following
Control commands are sent to the 82596 by writing them into the SCB and then asserting CA The 82596
examines the command performs the required action and then clears the SCB command word Control
commands perform the following types of tasks
The 82596 sends status reports to the CPU via the System Control Block The SCB contains four types of
status reports
Commands issued by the CPU
Status reported by the 82596
Operation of the Command Unit (CU) The SCB controls the CU by specifying the address of the Command
Block List (CBL) and by starting suspending resuming or aborting execution of CBL commands
Operation of the Bus Throttle The SCB controls the Bus Throttle timers by providing them with new values
and sending the Load and Start timer commands The timers can be operated in both the 32-bit Segmented
and Linear modes
Reception of frames by the Receive Unit (RU) The SCB controls the RU by specifying the address of the
Receive Frame Area and by starting suspending resuming or aborting frame reception
Acknowledgment of events that cause interrupts
Resetting the chip
The cause of the current interrupts These interrupts are caused by one or more of the following 82596
events
The status of the Command Unit
The status of the Receive Unit
Status reports from the 82596 regarding reception of corrupted frames
The Command Unit completes an Action Command that has its I bit set
The Receive Unit receives a frame
The Command Unit becomes inactive
The Receive Unit becomes not ready
82596CA
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