參數(shù)資料
型號(hào)： R5F562N8ADBG#U0
廠商： Renesas Electronics America
文件頁數(shù)： 135/148頁
文件大?。?/td> 0K
描述： MCU 32BIT FLASH 512KROM 176LFBGA
產(chǎn)品培訓(xùn)模塊： RX Compare Match Timer
RX DMAC
標(biāo)準(zhǔn)包裝： 1
系列： RX600
核心處理器： RX
芯體尺寸： 32-位
速度： 100MHz
連通性： EBI/EMI，I²C，SCI，SPI，USB
外圍設(shè)備： DMA，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 126
程序存儲(chǔ)器容量： 512KB（512K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 96K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10/12b，D/A 2x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 176-LFBGA
包裝： 托盤
2004 Microchip Technology Inc.
DS39609B-page 85
PIC18F6520/8520/6620/8620/6720/8720
8.0
8 X 8 HARDWARE MULTIPLIER
8.1
Introduction
An 8 x 8 hardware multiplier is included in the ALU of
the PIC18FXX20 devices. By making the multiply a
hardware operation, it completes in a single instruction
cycle. This is an unsigned multiply that gives a 16-bit
result. The result is stored in the 16-bit product register
pair (PRODH:PRODL). The multiplier does not affect
any flags in the ALUSTA register.
Making the 8 x 8 multiplier execute in a single cycle
gives the following advantages:
Higher computational throughput
Reduces code size requirements for multiply
algorithms
The performance increase allows the device to be used
in applications previously reserved for Digital Signal
Processors.
Table 8-1 shows a performance comparison between
enhanced devices using the single-cycle hardware
multiply and performing the same function without the
hardware multiply.
8.2
Operation
Example 8-1 shows the sequence to do an 8 x 8
unsigned multiply. Only one instruction is required
when one argument of the multiply is already loaded in
the WREG register.
Example 8-2 shows the sequence to do an 8 x 8 signed
multiply. 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 8-1:
8 x 8 UNSIGNED
MULTIPLY ROUTINE
EXAMPLE 8-2:
8 x 8 SIGNED MULTIPLY
ROUTINE
TABLE 8-1:
PERFORMANCE COMPARISON
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
s27.6 s69 s
Hardware multiply
1
100 ns
400 ns
1
s
8 x 8 signed
Without hardware multiply
33
91
9.1
s36.4 s91 s
Hardware multiply
6
600 ns
2.4
s6 s
16 x 16 unsigned
Without hardware multiply
21
242
24.2
s96.8 s242 s
Hardware multiply
28
2.8
s
11.2
s28 s
16 x 16 signed
Without hardware multiply
52
254
25.4
s
102.6
s254 s
Hardware multiply
35
40
4.0
s16.0 s40 s
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參數(shù)描述
R5F562N8ADFB 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX62N 144QFP 制造商:Renesas Electronics Corporation 功能描述:MCU,RX,32bit,100MHz,512KB Flash,LQFP144 制造商:Renesas Electronics Corporation 功能描述:MCU32Bit 165MIPS ROM512KRAM32K QFP144Pin
R5F562N8ADFB#V0 功能描述:MCU 32BIT FLASH 512KROM 144LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:RX600 標(biāo)準(zhǔn)包裝:96 系列:PIC® 16F 核心處理器:PIC 芯體尺寸:8-位 速度:20MHz 連通性:I²C，SPI 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲(chǔ)器容量:3.5KB（2K x 14） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:128 x 8 電壓 - 電源 (Vcc/Vdd):2.3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 包裝:管件
R5F562N8ADFP 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX62N 100QFP 制造商:Renesas Electronics Corporation 功能描述:MCU, 32BIT, RX62N, 100QFP 制造商:Renesas Electronics Corporation 功能描述:MCU, 32BIT, RX62N, 100QFP; Controller Family/Series:RX600; Core Size:32bit; No. of I/O's:72; Supply Voltage Min:2.7V; Supply Voltage Max:3.6V; Digital IC Case Style:LQFP; No. of Pins:100; Program Memory Size:512KB; RAM Memory ;RoHS Compliant: Yes 制造商:Renesas Electronics Corporation 功能描述:MCU32Bit 165MIPS ROM512KRAM32K QFP100Pin
R5F562N8ADFP#V0 功能描述:MCU 32BIT FLASH 512KROM 100LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:RX600 標(biāo)準(zhǔn)包裝:96 系列:PIC® 16F 核心處理器:PIC 芯體尺寸:8-位 速度:20MHz 連通性:I²C，SPI 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲(chǔ)器容量:3.5KB（2K x 14） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:128 x 8 電壓 - 電源 (Vcc/Vdd):2.3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 包裝:管件
R5F562N8ADLE 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX62N 145LGA 制造商:Renesas Electronics Corporation 功能描述:MCU, 32BIT, RX62N, 145LGA 制造商:Renesas Electronics Corporation 功能描述:MCU, 32BIT, RX62N, 145LGA, Controller Family/Series:RX600, Core Size:32bit, No. of I/O's:103, Supply Voltage Min:2.7V, Supply Voltage Max:3.6V, Digital IC Case Style:LGA, No. of Pins:145, Program Memory Size:512KB, RAM Memory , RoHS Compliant: Yes
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