668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 127
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: 127 of 312
- Download datasheet (2Mb)
16.3 Operation
The following steps explain how to set up a Timer B countdown timer.
1. Select perclk/2, perclk/16, or countdown Timer A1 in TBCR.
2. Enable Timer B by writing a 1 to bit 0 of TBCSR.
16.3.1 Handling Interrupts
The following steps explain how an interrupt is set up and used.
1. Write the vector to the interrupt service routine to the internal interrupt table.
2. Configure TBCSR to select which match registers will generate an interrupt.
3. Configure TBCR to select the interrupt priority (note that interrupts will be enabled
The interrupt request is cleared by reading from TBCSR.
16.3.2 Example ISR
A sample interrupt handler is shown below.
Chapter 16 Timer B
once this value is set; this step should be done last).
timerB_isr::
push af
ioi ld a, (TBCSR)
; handle all interrupts flagged in TBCSR here
; reload match register(s) if necessary
pop af
ipres
ret
; save used registers
; clear the interrupt request and get status
; restore used registers
117
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