參數(shù)資料
型號(hào): DSPIC30F6013T-20E/PF
廠商: Microchip Technology
文件頁(yè)數(shù): 160/228頁(yè)
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 132K 80TQFP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
標(biāo)準(zhǔn)包裝: 1,000
系列: dsPIC™ 30F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 20 MIPS
連通性: CAN,I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,LVD,POR,PWM,WDT
輸入/輸出數(shù): 68
程序存儲(chǔ)器容量: 132KB(44K x 24)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 6K x 8
電壓 - 電源 (Vcc/Vdd): 2.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 80-TQFP
包裝: 帶卷 (TR)
配用: DM300024-ND - KIT DEMO DSPICDEM 1.1
AC164314-ND - MODULE SKT FOR PM3 80PF
其它名稱: DSPIC30F6013T20EP
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2006 Microchip Technology Inc.
DS70117F-page 35
dsPIC30F6011/6012/6013/6014
All word accesses must be aligned to an even address.
Misaligned word data fetches are not supported so
care must be taken when mixing byte and word opera-
tions, or translating from 8-bit MCU code. Should a mis-
aligned read or write be attempted, an address error
trap will be generated. If the error occurred on a read,
the instruction underway is completed, whereas if it
occurred on a write, the instruction will be executed but
the write will not occur. In either case, a trap will then
be executed, allowing the system and/or user to exam-
ine the machine state prior to execution of the address
fault.
FIGURE 3-10:
DATA ALIGNMENT
All byte loads into any W register are loaded into the
LSB. The MSB is not modified.
A sign-extend (SE) instruction is provided to allow
users to translate 8-bit signed data to 16-bit signed
values. Alternatively, for 16-bit unsigned data, users
can clear the MSB of any W register by executing a
zero-extend
(ZE)
instruction
on
the
appropriate
address.
Although most instructions are capable of operating on
word or byte data sizes, it should be noted that some
instructions, including the DSP instructions, operate
only on words.
3.2.5
NEAR DATA SPACE
An 8-Kbyte ‘near’ data space is reserved in X address
memory space between 0x0000 and 0x1FFF, which is
directly addressable via a 13-bit absolute address field
within all memory direct instructions. The remaining X
address space and all of the Y address space is
addressable indirectly. Additionally, the whole of X data
space is addressable using MOV instructions, which
support memory direct addressing with a 16-bit
address field.
3.2.6
SOFTWARE STACK
The dsPIC DSC devices contain a software stack. W15
is used as the Stack Pointer.
The Stack Pointer always points to the first available
free word and grows from lower addresses towards
higher addresses. It pre-decrements for stack pops and
post-increments for stack pushes as shown in Figure 3-
11. Note that for a PC push during any CALL instruc-
tion, the MSB of the PC is zero-extended before the
push, ensuring that the MSB is always clear.
There is a Stack Pointer Limit register (SPLIM) associ-
ated with the Stack Pointer. 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 Effective Address (EA) is
generated using W15 as a source or destination
pointer, the address thus generated 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 will not occur.
The stack error trap will occur on a subsequent push
operation. Thus, for example, if it is desirable 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, thus preventing 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 3-11:
CALL
STACK FRAME
15
8 7
0
0001
0003
0005
0000
0002
0004
Byte1
Byte 0
Byte3
Byte 2
Byte5
Byte 4
LSB
MSB
Note:
A PC push during exception processing
will concatenate the SRL register to the
MSB of the PC prior to the push.
<Free Word>
PC<15:0>
000000000
0
15
W15 (before CALL)
W15 (after CALL)
S
ta
ck
Gr
o
w
s
T
o
wa
rd
s
Hig
her
A
ddre
s
0x0000
PC<22:16>
POP
: [--W15]
PUSH : [W15++]
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