DSPIC33FJ32GS606-E/PT Microchip Technology, DSPIC33FJ32GS606-E/PT Datasheet - Page 337
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DSPIC33FJ32GS606-E/PT
Manufacturer Part Number
DSPIC33FJ32GS606-E/PT
Description
16 Bit MCU/DSP 40MIPS 32KB FLASH 64 TQFP 10x10x1mm TRAY
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr
Datasheet
1.DSPIC33FJ32GS406-IPT.pdf
(418 pages)
Specifications of DSPIC33FJ32GS606-E/PT
Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
I²C, IrDA, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, QEI, POR, PWM, WDT
Number Of I /o
58
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
64-TFQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Part Number:
DSPIC33FJ32GS606-E/PT
Manufacturer:
Microchip Technology
Quantity:
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24.3
The Brown-out Reset (BOR) module is based on an
internal voltage reference circuit that monitors the
regulated supply voltage V
purpose of the BOR module is to generate a device
Reset when a brown-out condition occurs. Brown-out
conditions are generally caused by glitches on the AC
mains (for example, missing portions of the AC cycle
waveform due to bad power transmission lines, or volt-
age sags due to excessive current draw when a large
inductive load is turned on).
A BOR generates a Reset pulse, which resets the
device. The BOR selects the clock source, based on
the device Configuration bit values (FNOSC<2:0> and
POSCMD<1:0>).
If an oscillator mode is selected, the BOR activates the
Oscillator Start-up Timer (OST). The system clock is
held until OST expires. If the PLL is used, the clock is
held until the LOCK bit (OSCCON<5>) is ‘1’.
Concurrently, the PWRT time-out (TPWRT) is applied
before the internal Reset is released. If TPWRT = 0 and
a crystal oscillator is being used, then a nominal delay
of TFSCM = 100 is applied. The total delay in this case
is TFSCM.
The BOR Status bit (RCON<1>) is set to indicate that a
BOR has occurred. The BOR circuit continues to
operate while in Sleep or Idle modes and resets the
device should V
voltage.
24.4
For
dsPIC33FJ64GS406/606/608/610 devices, the WDT is
driven by the LPRC oscillator. When the WDT is enabled,
the clock source is also enabled.
24.4.1
The nominal WDT clock source from LPRC is
32.767 kHz. This feeds a prescaler that can be config-
ured for either 5-bit (divide-by-32) or 7-bit (divide-by-
128) operation. The prescaler is set by the WDTPRE
Configuration bit. With a 32.767 kHz input, the pres-
caler yields a nominal WDT time-out period (T
1 ms in 5-bit mode, or 4 ms in 7-bit mode.
A variable postscaler divides down the WDT prescaler
output and allows for a wide range of time-out periods.
The postscaler is controlled by the WDTPOST<3:0>
Configuration bits (FWDT<3:0>) which allow the
selection of 16 settings, from 1:1 to 1:32,768. Using the
prescaler and postscaler, time-out periods ranging from
1 ms to 131 seconds can be achieved.
2010 Microchip Technology Inc.
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
BOR: Brown-Out Reset
Watchdog Timer (WDT)
dsPIC33FJ32GS406/606/608/610
PRESCALER/POSTSCALER
DD
fall below the BOR threshold
CAP
/V
DDCORE
. The main
WDT
and
Preliminary
) of
The WDT, prescaler and postscaler are reset:
• On any device Reset
• On the completion of a clock switch, whether
• When a PWRSAV instruction is executed
• When the device exits Sleep or Idle mode to
• By a CLRWDT instruction during normal execution
24.4.2
If the WDT is enabled, it will continue to run during
Sleep or Idle modes. When the WDT time-out occurs,
the WDT will wake the device and code execution will
continue from where the PWRSAV instruction was
executed. The corresponding SLEEP or IDLE bits
(RCON<3:2>) will need to be cleared in software after
the device wakes up.
24.4.3
The WDT is enabled or disabled by the FWDTEN
Configuration bit in the FWDT Configuration register.
When the FWDTEN Configuration bit is set, the WDT is
always enabled.
The WDT can be optionally controlled in software when
the FWDTEN Configuration bit has been programmed
to ‘0’. The WDT is enabled in software by setting the
SWDTEN control bit (RCON<5>). The SWDTEN
control bit is cleared on any device Reset. The software
WDT option allows the user application to enable the
WDT for critical code segments and disable the WDT
during non-critical segments for maximum power
savings.
The WDT flag bit, WDTO (RCON<4>), is not automatically
cleared following a WDT time-out. To detect subsequent
WDT events, the flag must be cleared in software.
invoked by software (i.e., setting the OSWEN bit
after changing the NOSC bits) or by hardware
(i.e., Fail-Safe Clock Monitor)
(i.e., Sleep or Idle mode is entered)
resume normal operation
Note:
Note:
The CLRWDT and PWRSAV instructions
clear the prescaler and postscaler counts
when executed.
SLEEP AND IDLE MODES
ENABLING WDT
If the WINDIS bit (FWDT<6>) is cleared, the
CLRWDT instruction should be executed by
the application software only during the last
1/4 of the WDT period. This CLRWDT
window can be determined by using a timer.
If a CLRWDT instruction is executed before
this window, a WDT Reset occurs.
DS70591C-page 337
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