PIC17C766-33E/L Microchip Technology, PIC17C766-33E/L Datasheet - Page 69
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC17C766-33E/L
Manufacturer Part Number
PIC17C766-33E/L
Description
IC MCU CMOS 33MHZ 16K EPRM84PLCC
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C752-16L.pdf
(304 pages)
3.PIC17C752-16L.pdf
(6 pages)
Specifications of PIC17C766-33E/L
Core Processor
PIC
Core Size
8-Bit
Speed
33MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
66
Program Memory Size
32KB (16K x 16)
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
84-PLCC
For Use With
AC164318 - MODULE SKT MPLAB PM3 84PLCCDVA17XL841 - DEVICE ADAPTER FOR PIC17C762DM173001 - KIT DEVELOPMENT PICDEM17AC164027 - ADAPTER PICSTART PLUS 84PLCCAC174012 - MODULE SKT PROMATEII 84PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC17C766-33E/L
Manufacturer:
Microchip Technology
Quantity:
10 000
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Example 9-4 shows the sequence to do a 16 x 16
signed multiply. Equation 9-2 shows the algorithm
used. The 32-bit result is stored in four registers,
RES3:RES0. To account for the sign bits of the argu-
ments, each argument pairs most significant bit (MSb)
is tested and the appropriate subtractions are done.
EQUATION 9-2:
RES3:RES0
2000 Microchip Technology Inc.
= ARG1H:ARG1L ARG2H:ARG2L
= (ARG1H ARG2H 2
(ARG1H ARG2L 2
(ARG1L ARG2H 2
(ARG1L ARG2L)
(-1 ARG2H<7> ARG1H:ARG1L 2
(-1 ARG1H<7> ARG2H:ARG2L 2
16 x 16 SIGNED
MULTIPLICATION
ALGORITHM
8
8
16
)
)
)
16
16
)
)
+
+
+
+
+
EXAMPLE 9-4:
;
;
;
;
;
SIGN_ARG1
;
CONT_CODE
MOVFP
MULWF
MOVPF
MOVPF
MOVFP
MULWF
MOVPF
MOVPF
MOVFP
MULWF
MOVFP
ADDWF
MOVFP
ADDWFC
CLRF
ADDWFC
MOVFP
MULWF
MOVFP
ADDWF
MOVFP
ADDWFC
CLRF
ADDWFC
BTFSS
GOTO
MOVFP
SUBWF
MOVFP
SUBWFB
BTFSS
GOTO
MOVFP
SUBWF
MOVFP
SUBWFB
:
ARG1L, WREG
ARG2L
PRODH, RES1 ;
PRODL, RES0 ;
ARG1H, WREG
ARG2H
PRODH, RES3 ;
PRODL, RES2 ;
ARG1L, WREG
ARG2H
PRODL, WREG ;
RES1, F
PRODH, WREG ;
RES2, F
WREG, F
RES3, F
ARG1H, WREG ;
ARG2L
PRODL, WREG ;
RES1, F
PRODH, WREG ;
RES2, F
WREG, F
RES3, F
ARG2H, 7
SIGN_ARG1
ARG1L, WREG ;
RES2
ARG1H, WREG ;
RES3
ARG1H, 7
CONT_CODE
ARG2L, WREG ;
RES2
ARG2H, WREG ;
RES3
16 x 16 SIGNED
MULTIPLY ROUTINE
PIC17C7XX
; ARG1L * ARG2L ->
;
; ARG1H * ARG2H ->
;
; ARG1L * ARG2H ->
;
; Add cross
;
;
;
; ARG1H * ARG2L ->
;
; Add cross
;
;
;
; ARG2H:ARG2L neg?
; no, check ARG1
;
; ARG1H:ARG1L neg?
; no, done
;
PRODH:PRODL
PRODH:PRODL
PRODH:PRODL
PRODH:PRODL
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