TS68C429AMFA E2V, TS68C429AMFA Datasheet - Page 27

• Manufacturer Part Number: TS68C429AMFA
• Manufacturer: E2V

Specifications of TS68C429AMFA

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -55C to 125C
• Operating Temperature Classification: Military
• Mounting: Surface Mount
• Pin Count: 132
• Lead Free Status / Rohs Status: Compliant

9.3.3
e2v semiconductors SAS 2008
Interrupt Control Unit (ICU)
Figure 9-7.
•
The ICU is composed of 2 interrupt blocks with a daisy chain capability (transmitter and receiver blocks).
The daisy chain allows more than one circuit to be connected on the same interrupt line.
shows the use of a daisy chain. IRQxx, IACKxx, IEIxx, IEOxx must be understood as generic signals.
They are IRQTX, IACKTX, IEITX, IEOTX for the transmitter block and IRQRX, IACKRX, IEIRX, IEORX
for the receiver block.
If IEIxx = 0, no higher device have an interrupt pending on the same line so the interrupt is requested
and the IEOxx is forced high to disable lowest devices to generate interrupt. If IEIxx = 1, it waits for the
condition IEIxx = 0. When IEIxx is tied high, IEOxx is forced high.
The daisy chains can be used to program a priority between receivers and transmitters interrupts when
only one interrupt level is needed. An example is given in
Daisy Chain
Write Cycle Flow Chart
“Microprocessor Interface” on page
0848E–HIREL–02/08
TS68C429A
Figure 9-8
35.
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