參數(shù)資料
型號： PIC16F526-I/SL
廠商： Microchip Technology
文件頁數(shù)： 118/122頁
文件大小： 0K
描述： IC PIC MCU FLASH 1KX12 14SOIC
產(chǎn)品培訓模塊： 8-bit PIC® Microcontroller Portfolio
標準包裝： 57
系列： PIC® 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 20MHz
外圍設備： POR，WDT
輸入/輸出數(shù)： 11
程序存儲器容量： 1.5KB（1K x 12）
程序存儲器類型： 閃存
RAM 容量： 67 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 3x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 14-SOIC（0.154"，3.90mm 寬）
包裝： 管件
產(chǎn)品目錄頁面： 638 (CN2011-ZH PDF)
配用： ICE2000-ND - EMULATOR MPLAB-ICE 2000 POD
2009 Microchip Technology Inc.
DS39689F-page 95
PIC18F2221/2321/4221/4321 FAMILY
9.0
8 x 8 HARDWARE MULTIPLIER
9.1
Introduction
All PIC18 devices include an 8 x 8 hardware multiplier
as part of the ALU. The multiplier performs an unsigned
operation and yields a 16-bit result that is stored in the
product register pair, PRODH:PRODL. The multiplier’s
operation does not affect any flags in the STATUS
register.
Making multiplication a hardware operation allows it to
be completed in a single instruction cycle. This has the
advantages of higher computational throughput and
reduced code size for multiplication algorithms and
allows the PIC18 devices to be used in many applica-
tions previously reserved for digital signal processors.
A comparison of various hardware and software
multiply operations, along with the savings in memory
and execution time, is shown in Table 9-1.
9.2
Operation
Example 9-1 shows the instruction sequence for an 8 x 8
unsigned multiplication. Only one instruction is required
when one of the arguments is already loaded in the
WREG register.
Example 9-2 shows the sequence to do an 8 x 8 signed
multiplication. To account for the sign bits of the
arguments, each argument’s Most Significant bit (MSb)
is tested and the appropriate subtractions are done.
EXAMPLE 9-1:
8 x 8 UNSIGNED
MULTIPLY ROUTINE
EXAMPLE 9-2:
8 x 8 SIGNED MULTIPLY
ROUTINE
TABLE 9-1:
PERFORMANCE COMPARISON FOR VARIOUS MULTIPLY OPERATIONS
MOVF
ARG1, W
;
MULWF
ARG2
; ARG1 * ARG2 ->
; PRODH:PRODL
MOVF
ARG1, W
MULWF
ARG2
; ARG1 * ARG2 ->
; PRODH:PRODL
BTFSC
ARG2, SB
; Test Sign Bit
SUBWF
PRODH, F
; PRODH = PRODH
;
- ARG1
MOVF
ARG2, W
BTFSC
ARG1, SB
; Test Sign Bit
SUBWF
PRODH, F
; PRODH = PRODH
;
- ARG2
Routine
Multiply Method
Program
Memory
(Words)
Cycles
(Max)
Time
@ 40 MHz
@ 10 MHz
@ 4 MHz
8 x 8 unsigned
Without hardware multiply
13
69
6.9
μs27.6 μs69 μs
Hardware multiply
1
100 ns
400 ns
1
μs
8 x 8 signed
Without hardware multiply
33
91
9.1
μs36.4 μs91 μs
Hardware multiply
6
600 ns
2.4
μs6 μs
16 x 16 unsigned
Without hardware multiply
21
242
24.2
μs96.8 μs242 μs
Hardware multiply
28
2.8
μs
11.2
μs28 μs
16 x 16 signed
Without hardware multiply
52
254
25.4
μs
102.6
μs254 μs
Hardware multiply
35
40
4.0
μs16.0 μs40 μs
相關PDF資料
PDF描述
PIC16F59-I/PT IC PIC MCU FLASH 2KX12 44TQFP
PIC16F616-I/P IC PIC MCU FLASH 2KX14 14DIP
PIC16F628-20I/SS IC MCU FLASH 2KX14 COMP 20SSOP
PIC16F639-I/SS IC MCU FLASH 2KX14 20SSOP
PIC16F648A-I/ML IC MCU FLASH 4KX14 EEPROM 28QFN
相關代理商/技術參數(shù)
參數(shù)描述
PIC16F526T-I/MG 功能描述:8位微控制器 -MCU 1.5KB 64B 8MHz Internal Oscillator 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
PIC16F526T-I/SL 功能描述:8位微控制器 -MCU 15KB 64B 8MHz 8B ADC Internal Oscillator 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
PIC16F526T-I/SL030 制造商:Microchip Technology Inc 功能描述:
PIC16F526T-I/SL031 制造商:Microchip Technology Inc 功能描述:
PIC16F526T-I/SL033 制造商:Microchip Technology Inc 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*