20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 71

• Manufacturer Part Number: 20-668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0011

• Processor Type: Rabbit 3000 8-Bit
• Speed: 55.5MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 55.5 MHz
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Number Of Programmable I/os: 56
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 316-1061

7. E
I
XTERNAL
NTERRUPTS
7.1 Overview
The Rabbit 3000 has two external interrupts. Each interrupt has two input pins that can be
used to trigger the interrupt. The inputs have a pulse catcher that can detect rising, falling,
or both edges. The pulse needs to be present for a least three peripheral clocks to be
detected.
The signal on the external interrupt pin must be present for at least three peripheral clock
cycles to be detected. In addition, the Rabbit 3000 has a minimum latency of 10 clocks to
respond to an interrupt, so the minimum external interrupt response time is three periph-
eral clock cycles plus 10 processor clock cycles.
7.2 Block Diagram
Chapter 7 External Interrupts
61