dsPIC30F to dsPIC33F Conversion ... - Microchip Technology

1 2006 Microchip Technology 1dsPIC30F to dsPIC33 FGENERAL INFORMATIONThis document provides an overview of considerationsfor converting from dsPIC30F to dsPIC33F devices. Ifyou are undertaking this Conversion , it is recommendedthat you download data sheets and errata documentson these devices from our web site, dsPIC33F devices are VDC operationaldevices. If the dsPIC30F design was originally imple-mented at VDC, this would greatly simplify the con-version to the dsPIC33F family.

2 Both families are pin-compatible with the exception ofone pin on the 64- and 80-pin devices. The dsPIC33 FVDDCORE pin (pin 56 on 64-pin TQFP and pin 70 on80-pin TQFP) must be connected to circuit ground viaa 1 F capacitor. This same pin on the dsPIC30 Fdevices is a VSS pin and hence must be tied to jumper can be used to replace the capacitor toconnect to the Vss Low-Voltage-Detect (LVD) feature on thedsPIC30F devices is not available on the dsPIC33 Fdevices. Conversion can be simplified if the dsPIC30 FLVD feature is not implemented.

3 The dsPIC33F devices support a Brown-out Reset(BOR) feature, but not an equivalent dsPIC30F BORwith adjustable trip families support Programmable Power-up Timer(POR). The port I/O sink/source current is 4mA for thedsPIC33F devices versus 25mA for the dsPIC30 Fdevices. Run, Sleep and Idle currents are not yet and Idle currents will be reduced on the dsPIC33 Fdevices versus the dsPIC30F devices. The dsPIC33F devices have a programmable PLL,whereas the dsPIC30F PLL features x4, x8 or instruction set on the dsPIC33F and dsPIC30 Fdevices is 100% identical.

4 In general, Assembly and Clanguage code developed for the dsPIC30F devices isdirectly portable to dsPIC33F devices using the associ-ated device header (.h), include (.inc) and linker (.gld)support files. dsPIC33F devices support more interruptsources, therefore the interrupt vector table length hasincreased. User code starts at 0x200 versus 0x100 onthe dsPIC30F devices. Using the associated devicelinker (.gld) support file makes this change transparent. Some peripherals have new features hence additionalbits have been added in respective SFRs.

5 Some SFRbits have moved or been renamed between thedsPIC30F and dsPIC33F devices. If the Assembly andC language code utilizes the provided device supportfiles, code migration is straight forward. Table 1 presents a summary of the key differencesbetween the dsPIC30F to dsPIC33F devices. Pleaserefer to the specific device data sheets for further :Richard L. FischerMicrochip Technology 1:KEY DIFFERENCES BETWEEN dsPIC30F AND dsPIC33F DEVICESP eripheral ModuleChannelsCommentsdsPIC30 FdsPIC33 FInterrupt Controller4567 SFR bits are located in different SFRs.

6 There are more interrupts and associated SFRs on the dsPIC33F devices. Old SFR bit names are retained for 16-bit59No SFR bit name changes. Four new timers on the dsPIC33F Capture58No SFR bit name changes. Three new channels on the dsPIC33F Compare58No SFR bit name changes. Three new channels on the dsPIC33F 1 Msps ADC160 New module on the dsPIC33F 200 Ksps ADC160 New module on the dsPIC33F to dsPIC33F Conversion GuidelinesdsPIC30F to dsPIC33 FDS70172A-page 2 2006 Microchip Technology to 12-bit ADC032 ADxCON1 SFR: No bit name MspsNew modes/SFR bits added: 10/12 ADC mode 500 KspsAdded SFR bits to support 32 ADC SFR: No bit name changes.

7 New modes/SFR bits added. UxSTA SFR: No bit name changes. New mode/SFR bit added. Features added on dsPIC33F devices: IrDA , LIN support and Interrupt-on-TSR 12No SFR bit name changes. New SFR (I2 CxMSK) and address masking feature SFR: No bit name changes. SPIxCON1 SFR: No bit name changes. New bits added and some relocated to new SFR SPIxCON2. FIFO and Frame modes (CODEC)11No SFR bit name Technology02 New module on dsPIC33F Control PWM88No SFR bit name SFR bit name PortsPorts A-GPorts A-GNew feature added: Open Drain output on some feature on dsPIC33F SwitchingYesYesAdditional clock modes/features on dsPIC33F devices.

8 Oscillator control SFRs are SavingsYesYesNew Doze mode added to existing Sleep and Idle Configuration Use new device support files (.h, .inc and .gld) for modesx4, x8 and x16 PLLP rogrammable PLLSee Section of the dsPIC33F data sheet (DS70165) for system clock selection Pins1 pair3 pairsThere are now 3 PGC/EMUC and PGD/EMUD pairs of pins, which can be used for both programming and Pins4 pairs3 pairsTABLE 1:KEY DIFFERENCES BETWEEN dsPIC30F AND dsPIC33F DEVICES (CONTINUED)Peripheral ModuleChannelsCommentsdsPIC30 FdsPIC33F 2006 Microchip Technology 3dsPIC30F to dsPIC33 FPERIPHERALSThe dsPIC33F peripheral set is enhanced versus thefirst generation dsPIC30F product family.

9 Severalperipherals have identical features with someperipherals supporting additional DCI CODEC peripheral on the dsPIC33F devicesis identical to the DCI peripheral featured on thedsPIC30F6011A/12A/13A/14A devices. The ADC module on the dsPIC33F devices is slightlydifferent from the dsPIC30F ADC module. The basicfunctionality is the same, however the dsPIC33F ADCmodule is selectable between 10- and 12-bit operation,supporting higher Conversion rates and featuring moreexternal ADC dsPIC33F devices have 8 channels of DMA, whichare assignable to the following peripherals: UART, SPI,ADC, CODEC Interface, Input Capture, Output Com-pare/Standard PWM and ECAN status bits for determination of specific MathException Traps are available on the dsPIC33 Fdevices.

10 These bits are located in the INTCON1 digital I/O ports are 5V tolerant. New opendrain features are provided on some ports. dsPIC33 Fanalog pins configured as digital I/O pins are See the data sheet for further PROGRAM MEMORYLike the dsPIC30F devices, the dsPIC33F devicessupport Run-Time-Self-Programming (RTSP) . Table 2lists some small RTSP differences between the :If using the DCI peripheral on the "non-A" dsPIC30F devices, the work around calledout in the dsPIC30F6011/6012/6013/6014 Rev.