DSPIC30F1010-30I/SO Microchip Technology, DSPIC30F1010-30I/SO Datasheet - Page 16

• Manufacturer Part Number: DSPIC30F1010-30I/SO
• Description: IC DSPIC MCU/DSP 6K 28SOIC
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F1010-30I/SO

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 30 MIPs
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 6KB (2K x 24)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Data Bus Width: 16 bit
• Processor Series: DSPIC30F
• Core: dsPIC
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DM240002, DM300023, DM330011
• Package: 28SOIC W
• Device Core: dsPIC
• Family Name: dsPIC30
• Maximum Speed: 30 MHz
• Operating Supply Voltage: 3.3|5 V
• Number Of Programmable I/os: 21
• Interface Type: I2C/SPI/UART
• On-chip Adc: 6-chx10-bit
• Number Of Timers: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM300023 - KIT DEMO DSPICDEM SMPS BUCKDV164005 - KIT ICD2 SIMPLE SUIT W/USB CABLE
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

dsPIC30F1010/202X
43. Module: MCLR Pin
EXAMPLE 1:
DS80445D-page 16
; This function performs a clock-switch from FRC to FRC+PLL. All other oscillator
; settings remain unchanged.
; Filename: ClockSwitch.s
_ClockSwitch:
A brown-out event occurs when V
the minimum operating voltage for the device but
not all the way down to V
SMPS device is running with the PLL enabled and
a brown-out event occurs, the device may stop
running; and, the MCLR pin will not reset the
device. When this occurs, the device can only be
reset by cycling power to the V
It is recommended that an external Brown-out
Reset (BOR) circuit be used to hold the device in
Reset during a brown-out event to overcome this
problem. The external BOR circuit will use the
MCLR pin to hold the device in Reset. The
following work around, in combination with the
external BOR circuit, will ensure that the device is
properly reset after a brown-out event occurs.
Work around
The dsPIC DSC SMPS device must be powered
up with the PLL disabled, the Fail-Safe Clock
Monitor enabled, and Clock Switching enabled.
The PLL should be enabled in software via a clock
switch after the device is reset (refer to Section
29. “Oscillator” (DS70268) in the “dsPIC30F
Family Reference Manual” for details on clock
switching). This ensures that the MCLR pin is
functional and that the device can be reset by an
external BOR circuit (see Figure 1).
Affected Silicon Revisions
A1
X
mov
mov
mov
mov
mov.b
mov.b
mov.b
mov
mov
mov
mov
mov.b
mov.b
mov.b
return
A2
X
#OSCCON+1,w4
#0x0078, w0
#0x009A, w1
#0x0001, w2
w0, [w4]
w1, [w4]
w2, [w4]
#OSCCON,w4
#0x0046, w0
#0x0057, w1
#0x0001, w2
w0, [w4]
w1, [w4]
w2, [w4]
A3
X
CLOCK SWITCHING EXAMPLE
SS
; Get address of high OSCCON byte
; 1st password for high byte access to OSCCON
; 2nd password for low byte access to OSCCON
; NOSC value for FRC+PLL
; Write 1st password
; Write 2nd password
; Write NOSC value
; Get address of low OSCCON byte
; 1st password for high byte access to OSCCON
; 2nd password for low byte access to OSCCON
; Set OSWEN bit
; Write 1st password
; Write 2nd password
; Write OSWEN bit
. If the dsPIC DSC
DD
pins.
DD
drops below
FIGURE 1:
*Any commercially available BOR circuit
can be used in this configuration. Refer to
the BOR circuit manufacturer’s data sheet
for exact circuit configuration.
Use one of the following methods to perform the
work around.
Method 1: Insert the code shown in Example 1 at
the start of the program.
Method 2: Call the code shown in Example 1 in
the beginning of code execution by including the
ClockSwitch.s file in the project, and adding
the following code:
• For assembly programming, add the following
• For C programming, add the following
+5V
instruction at the beginning of the program:
instruction at the beginning of the program:
.global __reset
…
…
__reset:
rcall ClockSwitch
…
…
int main(void)
{
}
External
Circuit
BOR
U2*
ClockSwitch;
…
…
© 2010 Microchip Technology Inc.
R*
U1
MCLR
V
SS
+5V