參數(shù)資料
型號： PIC17C756A-16I/L
廠商： Microchip Technology
文件頁數(shù)： 125/159頁
文件大?。?/td> 0K
描述： IC MCU OTP 16KX16 A/D PWM 68PLCC
產品培訓模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝： 19
系列： PIC® 17C
核心處理器： PIC
芯體尺寸： 8-位
速度： 16MHz
連通性： I²C，SPI，UART/USART
外圍設備： 欠壓檢測/復位，POR，PWM，WDT
輸入/輸出數(shù)： 50
程序存儲器容量： 32KB（16K x 16）
程序存儲器類型： OTP
RAM 容量： 902 x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
數(shù)據轉換器： A/D 12x10b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
配用： AC164308-ND - MODULE SKT FOR PM3 68PLCC
DVA17XL681-ND - DEVICE ADAPTER FOR PIC17C752
DM173001-ND - KIT DEVELOPMENT PICDEM17
AC174007-ND - MODULE SKT PROMATEII 68PLCC
AC164024-ND - ADAPTER PICSTART PLUS 68PLCC
2000 Microchip Technology Inc.
DS30289B-page 67
PIC17C7XX
9.0
HARDWARE MULTIPLIER
All PIC17C7XX devices have an 8 x 8 hardware multi-
plier included in the ALU of the device. 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 into the 16-bit
Product register (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 algo-
rithms
The performance increase allows the device to be used
in applications previously reserved for Digital Signal
Processors.
Table 9-1 shows a performance comparison between
PIC17CXXX devices using the single cycle hardware
multiply and performing the same function without the
hardware multiply.
Example 9-1 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 9-2 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 9-1:
8 x 8 UNSIGNED
MULTIPLY ROUTINE
EXAMPLE 9-2:
8 x 8 SIGNED MULTIPLY
ROUTINE
TABLE 9-1:
PERFORMANCE COMPARISON
MOVFP
ARG1, WREG
;
MULWF
ARG2
; ARG1 * ARG2 ->
;
PRODH:PRODL
MOVFP
ARG1, WREG
MULWF
ARG2
; ARG1 * ARG2 ->
;
PRODH:PRODL
BTFSC
ARG2, SB
; Test Sign Bit
SUBWF
PRODH, F
; PRODH = PRODH
;
- ARG1
MOVFP
ARG2, WREG
BTFSC
ARG1, SB
; Test Sign Bit
SUBWF
PRODH, F
; PRODH = PRODH
;
- ARG2
Routine
Multiply Method
Program
Memory
(Words)
Cycles
(Max)
Time
@ 33 MHz
@ 16 MHz
@ 8 MHz
8 x 8 unsigned
Without hardware multiply
13
69
8.364
s17.25 s
34.50
s
Hardware multiply
1
0.121
s0.25 s0.50 s
8 x 8 signed
Without hardware multiply
—
———
—
Hardware multiply
6
0.727
s1.50 s3.0 s
16 x 16 unsigned
Without hardware multiply
21
242
29.333
s60.50 s
121.0
s
Hardware multiply
24
2.91
s6.0 s
12.0
s
16 x 16 signed
Without hardware multiply
52
254
30.788
s63.50 s
127.0
s
Hardware multiply
36
4.36
s9.0 s
18.0
s
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相關代理商/技術參數(shù)
參數(shù)描述
PIC17C756A-33/L 功能描述:8位微控制器 -MCU 32KB 902 RAM 50 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據 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
PIC17C756A-33/L 制造商:Microchip Technology Inc 功能描述:IC SM MCU 8-BIT
PIC17C756A-33/PT 功能描述:8位微控制器 -MCU 32KB 902 RAM 50 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據 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
PIC17C756A-33\PTC34 制造商:Microchip Technology 功能描述:MCU CMOS 64 LD
PIC17C756A-33E/L 功能描述:8位微控制器 -MCU 32KB 902 RAM 50 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據 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
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