DSPIC33FJ128GP310A-I/PT Microchip Technology, DSPIC33FJ128GP310A-I/PT Datasheet - Page 158
Manufacturer Part Number
IC DSPIC MCU/DSP 128K 100-TQFP
Specifications of DSPIC33FJ128GP310A-I/PT
Program Memory Type
Program Memory Size
128KB (128K x 8)
Package / Case
I²C, IrDA, LIN, SPI, UART/USART
AC'97, Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
-40°C ~ 85°C
Data Bus Width
Maximum Clock Frequency
Number Of Programmable I/os
Data Ram Size
Maximum Operating Temperature
+ 85 C
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DM240001, DV164033
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
876-1001 - DSPIC33 BREAKOUT BOARD
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Idle mode has these features:
• The CPU stops executing instructions.
• The WDT is automatically cleared.
• The system clock source remains active. By
• If the WDT or FSCM is enabled, the LPRC also
The device will wake from Idle mode on any of these
• Any interrupt that is individually enabled.
• Any device Reset.
• A WDT time-out.
On wake-up from Idle, the clock is reapplied to the CPU
and instruction execution will begin (2-4 clock cycles
later), starting with the instruction following the PWRSAV
instruction, or the first instruction in the ISR.
Any interrupt that coincides with the execution of a
PWRSAV instruction is held off until entry into Sleep or
Idle mode has completed. The device then wakes up
from Sleep or Idle mode.
Generally, changing clock speed and invoking one of the
power-saving modes are the preferred strategies for
circumstances, however, where this is not practical. For
example, it may be necessary for an application to
maintain uninterrupted synchronous communication,
even while it is doing nothing else. Reducing system
clock speed may introduce communication errors, while
using a power-saving mode may stop communications
Doze mode is a simple and effective alternative method
to reduce power consumption while the device is still
executing code. In this mode, the system clock
continues to operate from the same source and at the
same speed. Peripheral modules continue to be
clocked at the same speed, while the CPU clock speed
is reduced. Synchronization between the two clock
domains is maintained, allowing the peripherals to
access the SFRs while the CPU executes code at a
default, all peripheral modules continue to operate
normally from the system clock source, but can
also be selectively disabled (see Section 10.4
“Peripheral Module Disable”).
INTERRUPTS COINCIDENT WITH
POWER SAVE INSTRUCTIONS
Doze mode is enabled by setting the DOZEN bit (CLK-
DIV<11>). The ratio between peripheral and core clock
speed is determined by the DOZE<2:0> bits (CLK-
DIV<14:12>). There are eight possible configurations,
from 1:1 to 1:128, with 1:1 being the default setting.
It is also possible to use Doze mode to selectively
applications. This allows clock-sensitive functions,
such as synchronous communications, to continue
without interruption while the CPU idles, waiting for
something to invoke an interrupt routine. Enabling the
automatic return to full-speed CPU operation on
interrupts is enabled by setting the ROI bit (CLK-
DIV<15>). By default, interrupt events have no effect
on Doze mode operation.
For example, suppose the device is operating at
20 MIPS and the CAN module has been configured for
500 kbps based on this device operating speed. If the
device is now placed in Doze mode with a clock
frequency ratio of 1:4, the CAN module continues to
communicate at the required bit rate of 500 kbps, but
the CPU now starts executing instructions at a
frequency of 5 MIPS.
The Peripheral Module Disable (PMD) registers
provide a method to disable a peripheral module by
stopping all clock sources supplied to that module.
When a peripheral is disabled via the appropriate PMD
control bit, the peripheral is in a minimum power
consumption state. The control and status registers
associated with the peripheral are also disabled, so
writes to those registers will have no effect and read
values will be invalid.
A peripheral module is only enabled if both the
associated bit in the PMD register is cleared and the
peripheral is supported by the specific dsPIC
variant. If the peripheral is present in the device, it is
enabled in the PMD register by default.
Peripheral Module Disable
If a PMD bit is set, the corresponding
module is disabled after a delay of 1
instruction cycle. Similarly, if a PMD bit is
cleared, the corresponding module is
enabled after a delay of 1 instruction cycle
(assuming the module control registers
are already configured to enable module
2009 Microchip Technology Inc.