20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 9

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

Chapter 25. Breakpoints
Chapter 26. Low-Power Operation
Chapter 27. System/User Mode
Chapter 28. Specifications
Table of Contents
24.3 Operation ........................................................................................................................................252
24.4 Register Descriptions ......................................................................................................................253
25.1 Overview.........................................................................................................................................263
25.2 Dependencies ..................................................................................................................................266
25.3 Operation ........................................................................................................................................266
25.4 Register Descriptions ......................................................................................................................268
26.1 Overview.........................................................................................................................................271
26.2 Operation ........................................................................................................................................273
26.3 Register Descriptions ......................................................................................................................280
27.1 Overview.........................................................................................................................................283
27.2 Dependencies ..................................................................................................................................285
27.3 Operation ........................................................................................................................................287
27.4 Register Descriptions ......................................................................................................................294
28.1 DC Characteristics ..........................................................................................................................301
28.2 AC Characteristics ..........................................................................................................................303
28.3 Memory Access Times ...................................................................................................................304
28.4 Clock Speeds...................................................................................................................................314
24.3.1 Auxiliary I/O Bus ...................................................................................................................252
24.3.2 I/O Strobes .............................................................................................................................252
24.3.3 I/O Handshake ........................................................................................................................252
25.1.1 Block Diagram .......................................................................................................................264
25.1.2 Registers .................................................................................................................................265
25.2.1 I/O Pins ..................................................................................................................................266
25.2.2 Clocks .....................................................................................................................................266
25.2.3 Other Registers .......................................................................................................................266
25.2.4 Interrupts ................................................................................................................................266
25.3.1 Handling Interrupts ................................................................................................................266
25.3.2 Example ISR ..........................................................................................................................267
26.1.1 Registers .................................................................................................................................272
26.2.1 Unused Pins ............................................................................................................................273
26.2.2 Clock Rates ............................................................................................................................273
26.2.3 Short Chip Selects ..................................................................................................................274
26.2.4 Self-Timed Chip Selects ........................................................................................................279
27.1.1 Registers .................................................................................................................................284
27.2.1 I/O Pins ..................................................................................................................................285
27.2.2 Clocks .....................................................................................................................................285
27.2.3 Other Registers .......................................................................................................................285
27.2.4 Interrupts ................................................................................................................................286
27.3.1 Memory Protection Only .......................................................................................................287
27.3.2 Mixed System/User Mode Operation ....................................................................................288
27.3.3 Complete Operating System ..................................................................................................288
27.3.4 Enabling the System/User Mode ............................................................................................289
27.3.5 System/User Mode Instructions .............................................................................................290
27.3.6 System Mode Violation Interrupt ..........................................................................................291
27.3.7 Handling Interrupts in the System/User Mode ......................................................................292
28.3.1 Memory Reads .......................................................................................................................304
28.3.2 Memory Writes ......................................................................................................................305
28.3.3 External I/O Reads .................................................................................................................308
28.3.4 External I/O Writes ................................................................................................................309
28.3.5 Memory Access Times ...........................................................................................................311
28.4.1 Recommended Clock/Memory Configurations .....................................................................314
263
271
283
301