DSPIC33FJ64MC508 Microchip Technology Inc., DSPIC33FJ64MC508 Datasheet - Page 269

• Manufacturer Part Number: DSPIC33FJ64MC508
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

TABLE 22-2:
22.2
All of the dsPIC33FJXXXMCX06/X08/X10 Motor Con-
trol Family devices power their core digital logic at a
nominal 2.5V. This may create an issue for designs that
are required to operate at a higher typical voltage, such
as 3.3V. To simplify system design, all devices in the
dsPIC33FJXXXMCX06/X08/X10 Motor Control Family
family incorporate an on-chip regulator that allows the
device to run its core logic from V
The regulator provides power to the core from the other
V
than 5 ohms) capacitor (such as tantalum or ceramic)
be connected to the V
This helps to maintain the stability of the regulator. The
recommended value for the filter capacitor is provided
in TABLE 25-13: “Internal Voltage Regulator Speci-
fications” located in Section 25.1 “DC Characteris-
tics”.
On a POR
voltage regulator to generate an output voltage. During
this time, designated as T
disabled. T
resumes operation after any power-down.
© 2007 Microchip Technology Inc.
DD
pins. The regulator requires that a low-ESR (less
FPWRT<2:0>
Reserved
Bit Field
On-Chip Voltage Regulator
HPOL
LPOL
,
STARTUP
it takes approximately 20 μs for the on-chip
—
DSPIC33F CONFIGURATION BITS DESCRIPTION (CONTINUED)
dsPIC33FJXXXMCX06/X08/X10 MOTOR CONTROL FAMILY
is applied every time the device
DDCORE
STARTUP
FGS, FOSCSEL,
RESERVED3,
FOSC, FWDT,
/V
Register
CAP
FPOR
FPOR
FPOR
FPOR
FPOR
DD
, code execution is
.
pin (Figure 22-1).
Motor Control PWM High Side Polarity bit
1 = PWM module high side output pins have active-high output polarity
0 = PWM module high side output pins have active-low output polarity
Motor Control PWM Low Side Polarity bit
1 = PWM module low side output pins have active-high output polarity
0 = PWM module low side output pins have active-low output polarity
Power-on Reset Timer Value Select bits
111 = PWRT = 128 ms
110 = PWRT = 64 ms
101 = PWRT = 32 ms
100 = PWRT = 16 ms
011 = PWRT = 8 ms
010 = PWRT = 4 ms
001 = PWRT = 2 ms
000 = PWRT = Disabled
Reserved (either read as ‘1’ and write as ‘1’, or read as ‘0’ and
write as ‘0’)
Unimplemented (read as ‘0’, write as ‘0’)
FIGURE 22-1:
Note 1:
C
Description
F
These are typical operating voltages. Refer
to TABLE 25-13: “Internal Voltage Regu-
lator Specifications” located in
Section 25.1 “DC Characteristics” for the
full operating ranges of V
3.3V
CONNECTIONS FOR THE
ON-CHIP VOLTAGE
REGULATOR
V
V
V
DD
DDCORE
SS
dsPIC33F
/V
CAP
DD
DS70287A-page 267
and V
(1)
DDCORE
.