DSPIC33EP256MU806-E/MR Microchip Technology, DSPIC33EP256MU806-E/MR Datasheet - Page 138

• Manufacturer Part Number: DSPIC33EP256MU806-E/MR
• Description: 64 PINS, 256KB Flash, 28KB RAM, 60 MHz, USB, 2xCAN, 15 DMA 64 QFN 9x9x0.9mm TUBE
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33EPr

Specifications of DSPIC33EP256MU806-E/MR

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 60 MIPs
• Connectivity: CAN, I²C, IrDA, LIN, QEI, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 256KB (85.5K x 24)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 12K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 24x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-VFQFN Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

dsPIC33EPXXXMU806/810/814 and PIC24EPXXXGU810/814
7.3
dsPIC33EPXXXMU806/810/814
PIC24EPXXXGU810/814
following registers for the interrupt controller:
• INTCON1
• INTCON2
• INTCON3
• INTCON4
• INTTREG
7.3.1
Global interrupt control functions are controlled from
INTCON1, INTCON2, INTCON3 and INTCON4.
INTCON1 contains the Interrupt Nesting Disable bit
(NSTDIS) as well as the control and status flags for the
processor trap sources.
The INTCON2 register controls external interrupt
request signal behavior and the use of the alternate
vector table. This register also contains the General
Interrupt Enable bit (GIE).
INTCON3 contains the status flags for the USB, DMA,
and DO stack overflow status trap sources.
The
generated hard trap status bit (SGHT).
7.3.2
The IFS registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit, which is
set by the respective peripherals or external signal and
is cleared via software.
7.3.3
The IEC registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
DS70616E-page 138
INTCON4
Interrupt Control and Status
Registers
INTCON1 THROUGH INTCON4
IFSx
IECx
register
devices
contains
implement
the
software
and
Preliminary
the
7.3.4
The IPC registers are used to set the interrupt priority
level for each source of interrupt. Each user interrupt
source can be assigned to one of eight priority levels.
7.3.5
The INTTREG register contains the associated
interrupt vector number and the new CPU interrupt
priority level, which are latched into vector number
(VECNUM<7:0>) and Interrupt level bit (ILR<3:0>)
fields in the INTTREG register. The new interrupt
priority level is the priority of the pending interrupt.
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the same sequence as they are
listed in
Interrupt 0) is shown as having vector number 8 and a
natural order priority of 0. Thus, the INT0IF bit is found
in IFS0<0>, the INT0IE bit in IEC0<0> and the INT0IP
bits in the first position of IPC0 (IPC0<2:0>).
7.3.6
Although these registers are not specifically part of the
interrupt control hardware, two of the CPU Control
registers contain bits that control interrupt functionality.
For more information on these registers refer to
Section 2. “CPU” (DS70359) in the “dsPIC33E/
PIC24E Family Reference Manual”.
• The CPU STATUS register, SR, contains the
• The CORCON register contains the IPL3 bit
All Interrupt registers are described in
through
IPL<2:0> bits (SR<7:5>). These bits indicate the
current CPU interrupt priority level. The user
software can change the current CPU priority
level by writing to the IPL bits.
which, together with IPL<2:0>, also indicates the
current CPU priority level. IPL3 is a read-only bit
so that trap events cannot be masked by the user
software.
Register 7-7
Table
IPCx
INTTREG
STATUS/CONTROL REGISTERS
7-1. For example, the INT0 (External
 2009-2011 Microchip Technology Inc.
in the following pages.
Register 7-3