dsPIC33FJ32MC104-I/PT Microchip Technology, dsPIC33FJ32MC104-I/PT Datasheet - Page 196

• Manufacturer Part Number: dsPIC33FJ32MC104-I/PT
• Description: Digital Signal Processors & Controllers - DSP, DSC 16bit Mtr Cnt Fam 16 MIPS 32KBFLSH 2KBRAM
• Manufacturer: Microchip Technology
• Type: dsPIC33FJ32(GP/MC)101/102/104r

Specifications of dsPIC33FJ32MC104-I/PT

• Rohs: yes
• Core: dsPIC33F
• Data Bus Width: 16 bit
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Maximum Clock Frequency: 7.37 MHz, 32 kHz
• Number Of Programmable I/os: 35
• Number Of Timers: 5 x 16-bit, 2 x 32-bit
• Device Million Instructions Per Second: 16 MIPs
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 125 C
• Package / Case: TQFP-44
• Mounting Style: SMD/SMT
• Family / Core: dsPIC33FJ32(GP/MC)101/102/104
• Interface Type: I2C, SPI, UART
• Minimum Operating Temperature: - 40 C
• On-chip Adc: Yes
• Product: DSPs
• Program Memory Type: Flash
• Supply Current: 10 mA

dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
16.1
1.
2.
3.
4.
5.
6.
DS70652E-page 196
Note:
Note:
Note:
In Frame mode, if there is a possibility that the
master may not be initialized before the slave:
a)
b)
In Non-Framed 3-Wire mode, (i.e., not using
SSx from a master):
a)
b)
FRMEN (SPIxCON2<15>) = 1 and SSEN
(SPIxCON1<7>) = 1 are exclusive and invalid.
In Frame mode, SCKx is continuous and the
Frame Sync pulse is active on the SSx pin,
which indicates the start of a data frame.
In Master mode only, set the SMP bit
(SPIxCON1<9>) to a ‘1’ for the fastest SPI data
rate possible. The SMP bit can only be set at the
same time or after the MSTEN bit (SPIxCON1<5>)
is set.
To avoid invalid slave read data to the master,
the user’s master software must ensure enough
time for slave software to fill its write buffer
before the user application initiates a master
write/read cycle. It is always advisable to pre-
load the SPIxBUF Transmit register in advance
of the next master transaction cycle. SPIxBUF is
transferred to the SPIx Shift register and is
empty once the data transmission begins.
The SPI related pins (SDI1, SDO1, SCK1) are
located at fixed positions in the dsPIC33FJ16(GP/
MC)10X devices. The same pins are remappable
in the dsPIC33FJ32(GP/MC)10X devices.
SPI Helpful Tips
If FRMPOL (SPIxCON2<13>) = 1, use a
pull-down resistor on SSx.
If FRMPOL = 0, use a pull-up resistor on SSx.
If CKP (SPIxCON1<6>) = 1, always place a
pull-up resistor on SSx.
If CKP = 0, always place a pull-down
resistor on SSx.
This insures that the first frame transmission
after initialization is not shifted or corrupted.
This will insure that during power-up and
initialization, the master/slave will not lose
sync due to an errant SCK transition that
would cause the slave to accumulate data
shift errors for both transmit and receive,
appearing as corrupted data.
Not all third-party devices support Frame
mode timing. Refer to the SPI electrical
characteristics for details.
16.2
Many useful resources are provided on the main prod-
uct page of the Microchip web site for the devices listed
in this data sheet. This product page, which can be
accessed using this link, contains the latest updates
and additional information.
16.2.1
• Section 18. “Serial Peripheral Interface (SPI)”
• Code Samples
• Application Notes
• Software Libraries
• Webinars
• All related “dsPIC33F/PIC24H Family Reference
• Development Tools
Note:
(DS70206) in the “dsPIC33F/PIC24H Family
Reference Manual”.
Manual” sections
SPI Resources
In the event you are not able to access
the product page using the link above,
enter this URL in your browser:
http://www.microchip.com/wwwproducts/
Devices.aspx?dDocName=en554109
KEY RESOURCES
 2011-2012 Microchip Technology Inc.