668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 53

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

Specifications of 668-0011

• Rohs Status: RoHS non-compliant
• 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
• Features: -
• Other names: 316-1043

5.2 Dependencies
5.2.1 I/O Pins
There are three chip select pins: /CS0, /CS1, and /CS2; two read strobes, /OE0 and /OE1;
and two write strobes, /WE0 and /WE1.
There are eight dedicated data bus pins, D0 through D7.
There are 20 dedicated address pins, A0 through A19.
5.2.2 Clocks
All memory operations are clocked by the processor clock.
5.2.3 Interrupts
When a write is attempted to a write-protected 64 KB or 4 KB block, a write-protection
violation interrupt is generated. The interrupt request is cleared when it is handled. The
write-protection violation interrupt vector is in the IIR at offset 0x090. It is always set to
Priority 3.
When a stack-related write is attempted to a region outside that set by the stack limit regis-
ters, a stack limit violation occurs. The interrupt request is cleared when it is handled. The
stack limit violation interrupt vector is in the IIR at offset 0x1B0. It is always set to Priority 3.
Chapter 5 Memory Management
43