668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 233
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: 233 of 312
- Download datasheet (2Mb)
Some sample code for both System Mode interrupts and User Mode interrupts is shown
below. The use of SETUSRP and SETSYSP provides checks against stack mismatches and
incorrect System/User Modes coming out of the User Mode handler.
Chapter 26 System/User Mode
systemmode_isr:
usermode_isr:
sures
ipres
ret
push su
setusrp 0x1234
call user_handler
setsysp 0x1234
sures
ipres
ret
... handle interrupt ...
; jumped to from interrupt vector table
; reenter previous mode
; restore previous interrupt priority
; jumped to from interrupt vector table
;
; preserve current SU stack
; enter user mode with stack compare value
; handle interrupt at user level
; return to system mode
; reenter previous mode
; restore previous interrupt priority
(still in system mode at this point)
223
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