參數(shù)資料
型號(hào)： PIC18F2450-I/SP
廠商： Microchip Technology
文件頁(yè)數(shù)： 101/241頁(yè)
文件大小： 0K
描述： IC PIC MCU FLASH 8KX16 28DIP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝： 15
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 48MHz
連通性： UART/USART，USB
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，HLVD，POR，PWM，WDT
輸入/輸出數(shù)： 23
程序存儲(chǔ)器容量： 16KB（8K x 16）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 28-DIP（0.300"，7.62mm）
包裝： 管件
產(chǎn)品目錄頁(yè)面： 646 (CN2011-ZH PDF)
配用： DM163025-ND - PIC DEM FULL SPEED USB DEMO BRD
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2010 Microchip Technology Inc.
DS70141F-page 19
dsPIC30F3010/3011
2.0
CPU ARCHITECTURE
OVERVIEW
2.1
Core Overview
The core has a 24-bit instruction word. The Program
Counter (PC) is 23 bits wide with the Least Significant
bit (LSb) always clear (see Section 3.1 “Program
Address Space”), and the Most Significant bit (MSb)
is ignored during normal program execution, except for
certain specialized instructions. Thus, the PC can
address up to 4M instruction words of user program
space. An instruction prefetch mechanism is used to
help maintain throughput. Program loop constructs,
free from loop count management overhead, are sup-
ported using the DO and REPEAT instructions, both of
which are interruptible at any point.
The working register array consists of 16x16-bit regis-
ters, each of which can act as data, address or offset
registers. One working register (W15) operates as a
Software Stack Pointer (SP) for interrupts and calls.
The data space is 64 Kbytes (32K words) and is split into
two blocks, referred to as X and Y data memory. Each
block has its own independent Address Generation Unit
(AGU). Most instructions operate solely through the X
memory AGU, which provides the appearance of a
single unified data space. The Multiply-Accumulate
(MAC) class of dual source DSP instructions operate
through both the X and Y AGUs, splitting the data
address space into two parts (see Section 3.2 “Data
Address Space”). The X and Y data space boundary is
device specific and cannot be altered by the user. Each
data word consists of 2 bytes, and most instructions can
address data either as words or bytes.
There are two methods of accessing data stored in
program memory:
The upper 32 Kbytes of data space memory can
be mapped into the lower half (user space) of pro-
gram space at any 16K program word boundary,
defined by the 8-bit Program Space Visibility Page
(PSVPAG) register. This lets any instruction
access program space as if it were data space,
with a limitation that the access requires an addi-
tional cycle. Moreover, only the lower 16 bits of
each instruction word can be accessed using this
method.
Linear indirect access of 32K word pages within
program space is also possible using any working
register, via table read and write instructions.
Table read and write instructions can be used to
access all 24 bits of an instruction word.
Overhead-free circular buffers (Modulo Addressing)
are supported in both X and Y address spaces. This is
primarily intended to remove the loop overhead for
DSP algorithms.
The X AGU also supports Bit-Reversed Addressing on
destination effective addresses, to greatly simplify input
or output data reordering for radix-2 FFT algorithms.
details on Modulo and Bit-Reversed addressing.
The core supports Inherent (no operand), Relative, Lit-
eral, Memory Direct, Register Direct, Register Indirect,
Register Offset and Literal Offset Addressing modes.
Instructions are associated with predefined addressing
modes, depending upon their functional requirements.
For most instructions, the core is capable of executing
a data (or program data) memory read, a working reg-
ister (data) read, a data memory write and a program
(instruction) memory read per instruction cycle. As a
result, 3 operand instructions are supported, allowing
C = A + B operations to be executed in a single cycle.
A DSP engine has been included to significantly
enhance the core arithmetic capability and throughput.
It features a high-speed 17-bit by 17-bit multiplier, a
40-bit ALU, two 40-bit saturating accumulators and a
40-bit bidirectional barrel shifter. Data in the accumula-
tor or any working register can be shifted up to 16 bits
right or 16 bits left in a single cycle. The DSP instruc-
tions operate seamlessly with all other instructions and
have been designed for optimal real-time performance.
The MAC class of instructions can concurrently fetch
two data operands from memory, while multiplying two
W registers. To enable this concurrent fetching of data
operands, the data space has been split for these
instructions and linear for all others. This has been
achieved in a transparent and flexible manner, by
dedicating certain working registers to each address
space for the MAC class of instructions.
The core does not support a multi-stage instruction
pipeline. However, a single stage instruction prefetch
mechanism is used, which accesses and partially
decodes instructions a cycle ahead of execution, in
order to maximize available execution time. Most
instructions execute in a single cycle, with certain
exceptions.
The core features a vectored exception processing
structure for traps and interrupts, with 62 independent
vectors. The exceptions consist of up to 8 traps (of
which 4 are reserved) and 54 interrupts. Each interrupt
is prioritized based on a user assigned priority between
1 and 7 (1 being the lowest priority and 7 being the
highest) in conjunction with a predetermined ‘natural
order’. Traps have fixed priorities, ranging from 8 to 15.
Note:
This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals,
register
descriptions
and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046). For more information on the
device instruction set and programming,
refer to the “16-bit MCU and DSC
Programmer’s
Reference
Manual”
(DS70157).
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PIC18F2450T-I/ML 功能描述:8位微控制器 -MCU 16KB 768 RAM 23 I/O FS-USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F2450T-I/SO 功能描述:8位微控制器 -MCU 16KB 768 RAM 23 I/O FS-USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F2455-I/SO 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F2455-I/SO 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 18F2455 SOIC28
PIC18F2455-I/SP 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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