668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 229
668-0010
Manufacturer Part Number
668-0010
Description
IC MPU RABIT3000 55.5MHZ 128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 668-0010
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
316-1016
- Current page: 229 of 312
- Download datasheet (2Mb)
Figure 26-3 shows an overview of this level of operation.
26.3.4 Enabling the System/User Mode
The following steps describe how to enable the System/User Mode.
1. If a peripheral needs to be accessed while in User Mode, write to the appropriate user
2. Write a 1 to bit 0 of EDMR to enable System/User Mode.
3. Execute the SETUSR instruction to enter User Mode.
After the User Mode is entered, the limitations described earlier are in effect — writes to
protected registers will be ignored, Priority 3 is not available, and executing an IDET will
cause a System Mode Violation interrupt. Other features such as write protection may be
in effect for the User Mode as well.
Chapter 26 System/User Mode
enable register to allow that access.
Figure 26-3. System/User Mode Setup for Operating System
System Mode
SYSCALL
Flash file
Interrupt
handlers
handler
system
Return from interrupts
SYSCALL, RST
Interrupts,
User Mode
User-defined
Application
interrupts
code
219
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