KU82596DX25 S Z714 Intel, KU82596DX25 S Z714 Datasheet - Page 31

• Manufacturer Part Number: KU82596DX25 S Z714
• Manufacturer: Intel

Specifications of KU82596DX25 S Z714

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

The 82596 sends status reports to the CPU via the System Control Block The SCB contains four types of
status reports
Events can be cleared only by CPU acknowledgment If some events are not acknowledged by the ACK field
the Interrupt signal (INT) will be reissued after Channel Attention (CA) is processed Furthermore if a new
event occurs while an interrupt is set the interrupt is temporarily cleared to trigger edge-triggered interrupt
controllers
The CPU uses the Channel Attention line to cause the 82596 to examine the SCB This signal is trailing-edge
triggered the 82596 latches CA on the trailing edge The latch is cleared by the 82596 before the SCB
control command is read
31
31
In MONITOR mode these counters change function
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
ACK
ACK
X
0
ALIGNMENT ERRORS
OVERRUN ERRORS
CUC
CUC
RFA OFFSET
RFA OFFSET
T-ON TIMER
ODD WORD
ODD WORD
R
R
RUC
RUC
Figure 19 SCB 32-Bit Segmented Mode
SHORT FRAME ERRORS
RESOURCE ERRORS ( )
X X X X
0 0 0 0
OVERRUN ERRORS ( )
Figure 18 SCB 82586 Mode
ALIGNMENT ERRORS
RCVCDT ERRORS ( )
CRC ERRORS
16
16
15
15
STAT
STAT
0
0
RESOURCE ERRORS
CUS
CRC ERRORS
CUS
T-OFF TIMER
EVEN WORD
CBL OFFSET
EVEN WORD
CBL OFFSET
0
RUS
RUS
0 0 0 0 SCB
T 0 0 0 SCB
82596DX SX
0
0
SCB
SCB
SCB
SCB
SCB
SCB
SCB
SCB
SCB
SCB
SCB
a
a
a
a
a
a
a
a
a
a
a
4
8
12
4
8
12
16
20
24
28
32
31