20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 285

• 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

B.1.5 Memory Protection
The ability to inhibit writes to physical memory was added. The sixteen 64 KB physical
memory blocks can be individually protected, and two of those blocks can additionally be
subdivided and protected at a granularity of 4 KB. When a write is attempted, a new
Priority 3 write-protection interrupt request is generated.
The write-protection can be enabled for the User mode only or for all modes (see
Chapter 26 for more information).
Appendix B Rabbit 3000 Revisions
0xFFFFF
0x00000
WPHR = 0x0085
WPLR = 0x006C
Figure B-1. Sample Memory Protection Layout
WPSAR = 0x0004
WPSAHR = 0x0007
WPSALR = 0x00CC
0x4FFFF
0x48000
0x40000
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