DSPIC33FJ64MC804-E/ML Microchip Technology, DSPIC33FJ64MC804-E/ML Datasheet - Page 67
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DSPIC33FJ64MC804-E/ML
Manufacturer Part Number
DSPIC33FJ64MC804-E/ML
Description
16-bit DSC, 64KB Flash,Motor,CAN, DMA,40 MIPS,nanoWatt 44 QFN 8x8x0.9mm TUBE
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr
Specifications of DSPIC33FJ64MC804-E/ML
Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
CAN, I²C, IrDA, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, Motor Control PWM, QEI, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 9x10b/12b, D/A 6x16b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
44-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DV164033 - KIT START EXPLORER 16 MPLAB ICD2DM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.2.7
In addition to its use as a working register, the W15
register
dsPIC33FJ64MCX02/X04 and dsPIC33FJ128MCX02/
X04 devices is also used as a software Stack Pointer.
The Stack Pointer always points to the first available
free word and grows from lower to higher addresses. It
pre-decrements for stack pops and post-increments for
stack pushes, as shown in
during any CALL instruction, the MSb of the PC is
zero-extended before the push, ensuring that the MSb
is always clear.
The Stack Pointer Limit register (SPLIM) associated
with the Stack Pointer sets an upper address boundary
for the stack. SPLIM is uninitialized at Reset. As is the
case for the Stack Pointer, SPLIM<0> is forced to ‘0’
because all stack operations must be word aligned.
Whenever an EA is generated using W15 as a source
or destination pointer, the resulting address is
compared with the value in SPLIM. If the contents of
the Stack Pointer (W15) and the SPLIM register are
equal and a push operation is performed, a stack error
trap does not occur. The stack error trap occurs on a
subsequent push operation. For example, to cause a
stack error trap when the stack grows beyond address
0x2000 in RAM, initialize the SPLIM with the value
0x1FFE.
Similarly, a Stack Pointer underflow (stack error) trap is
generated when the Stack Pointer address is found to
be less than 0x0800. This prevents the stack from
interfering with the Special Function Register (SFR)
space.
A write to the SPLIM register should not be immediately
followed by an indirect read operation using W15.
FIGURE 4-6:
© 2011 Microchip Technology Inc.
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
0x0000
Note:
15
000000000
SOFTWARE STACK
A PC push during exception processing
concatenates the SRL register to the MSb
of the PC prior to the push.
in
<Free Word>
PC<15:0>
the
PC<22:16>
CALL STACK FRAME
Figure
dsPIC33FJ32MC302/304,
0
4-6. For a PC push
POP : [--W15]
PUSH : [W15++]
W15 (before CALL)
W15 (after CALL)
4.2.8
The dsPIC33F product family supports Data RAM
protection features that enable segments of RAM to be
protected when used in conjunction with Boot and
Secure Code Segment Security. BSRAM (Secure RAM
segment for BS) is accessible only from the Boot
Segment Flash code when enabled. SSRAM (Secure
RAM segment for RAM) is accessible only from the
Secure Segment Flash code when enabled. See
Table 4-1
SFRs.
4.3
The addressing modes shown in
basis of the addressing modes optimized to support the
specific features of individual instructions. The
addressing modes provided in the MAC class of
instructions differ from those in the other instruction
types.
4.3.1
Most file register instructions use a 13-bit address field
(f) to directly address data present in the first 8192
bytes of data memory (near data space). Most file
register instructions employ a working register, W0,
which is denoted as WREG in these instructions. The
destination is typically either the same file register or
WREG (with the exception of the MUL instruction),
which writes the result to a register or register pair. The
MOV instruction allows additional flexibility and can
access the entire data space.
4.3.2
The three-operand MCU instructions are of the form:
Operand 3 = Operand 1 <function> Operand 2
where:
Operand 1 is always a working register (that is, the
addressing mode can only be register direct), which is
referred to as Wb.
Operand 2 can be a W register, fetched from data
memory, or a 5-bit literal. The result location can be
either a W register or a data memory location. The fol-
lowing addressing modes are supported by MCU
instructions:
• Register Direct
• Register Indirect
• Register Indirect Post-Modified
• Register Indirect Pre-Modified
• 5-bit or 10-bit Literal
Note:
Instruction Addressing Modes
for an overview of the BSRAM and SSRAM
DATA RAM PROTECTION FEATURE
FILE REGISTER INSTRUCTIONS
MCU INSTRUCTIONS
Not all instructions support all the
addressing
Individual
different subsets of these addressing
modes.
instructions
modes
Table 4-40
DS70291E-page 67
given
can
support
form the
above.
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