DSPIC30F4012-20I/ML Microchip Technology, DSPIC30F4012-20I/ML Datasheet - Page 27

• Manufacturer Part Number: DSPIC30F4012-20I/ML
• Description: IC DSPIC MCU/DSP 48K 44QFN
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F4012-20I/ML

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 48KB (16K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFN
• Core Frequency: 40MHz
• Core Supply Voltage: 5.5V
• Embedded Interface Type: CAN, I2C, SPI, UART
• No. Of I/o's: 20
• Flash Memory Size: 48KB
• Supply Voltage Range: 2.5V To 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44QFN4 - SOCKET TRANS ICE 28DIP TO 44QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DSPIC30F401220IML

3.1.1
This architecture fetches 24-bit wide program memory.
Consequently, instructions are always aligned. How-
ever, as the architecture is modified Harvard, data can
also be present in program space.
There are two methods by which program space can
be accessed; via special table instructions, or through
the remapping of a 16K word program space page into
the upper half of data space (see
Access From Program Memory Using Program
Space
tions offer a direct method of reading or writing the least
significant word (lsw) of any address within program
space, without going through data space. The TBLRDH
and TBLWTH instructions are the only method whereby
the upper 8 bits of a program space word can be
accessed as data.
The PC is incremented by two for each successive
24-bit program word. This allows program memory
addresses to directly map to data space addresses.
Program memory can thus be regarded as two, 16-bit
word-wide address spaces, residing side by side, each
with the same address range. TBLRDL and TBLWTL
access the space which contains the least significant
data word, and TBLRDH and TBLWTH access the space
which contains the Most Significant Byte of data.
Figure 3-2
operations and data space accesses (PSV = 1). Here,
P<23:0> refers to a program space word, whereas
D<15:0> refers to a data space word.
FIGURE 3-3:
© 2010 Microchip Technology Inc.
Visibility”). The TBLRDL and TBLWTL instruc-
Program Memory
‘Phantom’ Byte
(read as ‘0’).
illustrates how the EA is created for table
DATA ACCESS FROM PROGRAM
MEMORY USING TABLE
INSTRUCTIONS
PC Address
0x000004
0x000006
0x000002
0x000000
PROGRAM DATA TABLE ACCESS (LEAST SIGNIFICANT WORD)
00000000
00000000
00000000
00000000
Section 3.1.2 “Data
23
TBLRDL.W
16
A set of table instructions is provided to move byte or
word-sized data to and from program space (see
Figure 3-3
1.
2.
3.
4.
dsPIC30F4011/4012
TBLRDL: Table Read Low
Word: Read the lsw of the program address;
P<15:0> maps to D<15:0>.
Byte: Read one of the LSBs of the program
address;
P<7:0> maps to the destination byte when byte
select = 0;
P<15:8> maps to the destination byte when byte
select = 1.
TBLWTL: Table Write Low (refer to
“Flash Program Memory”
programming).
TBLRDH: Table Read High
Word: Read the msw of the program address;
P<23:16> maps to D<7:0>; D<15:8> will always
be = 0.
Byte: Read one of the MSBs of the program
address;
P<23:16> maps to the destination byte when
byte select = 0;
The destination byte will always be ‘0’ when byte
select = 1.
TBLWTH: Table Write High (refer to
“Flash Program Memory”
programming).
and
TBLRDL.B (Wn<0> = 1)
Figure
8
TBLRDL.B (Wn<0> = 0)
3-4).
for details on Flash
for details on Flash
0
DS70135G-page 27
Section 6.0
Section 6.0