DSPIC30F3012-30I/P Microchip Technology Inc., DSPIC30F3012-30I/P Datasheet - Page 70
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DSPIC30F3012-30I/P
Manufacturer Part Number
DSPIC30F3012-30I/P
Description
16 BIT MCU/DSP 18LD 30MIPS 24 KB FLASH
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC30F3012-30IP.pdf
(204 pages)
Specifications of DSPIC30F3012-30I/P
A/d Inputs
8-Channels, 12-Bit
Cpu Speed
30 MIPS
Eeprom Memory
1K Bytes
Input Output
12
Interface
I2C/SPI/UART, USART
Ios
12
Memory Type
Flash
Number Of Bits
16
Package Type
18-pin PDIP
Programmable Memory
24K Bytes
Ram Size
2K Bytes
Timers
3-16-bit, 1-32-bit
Voltage, Range
2.5-5.5
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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dsPIC30F2011/2012/3012/3013
8.6
A context saving option is available using shadow reg-
isters. Shadow registers are provided for the DC, N,
OV, Z and C bits in SR, and the registers W0 through
W3. The shadows are only one level deep. The shadow
registers are accessible using the PUSH.S and POP.S
instructions only.
When the processor vectors to an interrupt, the
PUSH.S instruction can be used to store the current
value of the aforementioned registers into their
respective shadow registers.
If an ISR of a certain priority uses the PUSH.S and
POP.S instructions for fast context saving, then a
higher priority ISR should not include the same instruc-
tions. Users must save the key registers in software
during a lower priority interrupt if the higher priority ISR
uses fast context saving.
DS70139D-page 68
Fast Context Saving
8.7
The interrupt controller supports three external inter-
rupt request signals, INT0-INT2. These inputs are edge
sensitive; they require a low-to-high or a high-to-low
transition to generate an interrupt request. The
INTCON2 register has three bits, INT0EP-INT2EP, that
select the polarity of the edge detection circuitry.
8.8
The interrupt controller may be used to wake-up the
processor from either Sleep or Idle modes, if Sleep or
Idle mode is active when the interrupt is generated.
If an enabled interrupt request of sufficient priority is
received by the interrupt controller, then the standard
interrupt request is presented to the processor. At the
same time, the processor wakes up from Sleep or Idle
and begin execution of the Interrupt Service Routine
(ISR) needed to process the interrupt request.
External Interrupt Requests
Wake-up from Sleep and Idle
© 2006 Microchip Technology Inc.
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