參數(shù)資料
型號(hào)： DRM044
英文描述： Central Heating Controller using the MC68HC908LJ12
中文描述： 集中供暖控制器使用MC68HC908LJ12
文件頁數(shù)： 38/80頁
文件大小： 1025K
代理商： DRM044
Software
Designer Reference Manual
DRM040 — Rev 0
38
Software
MOTOROLA
3.1.8 SDiv48
Subroutine
“SDiv48” divides a signed 48-bit number in the numerator by
an unsigned 48-bit number in the denominator. This is done by checking
first the most significant bit of the numerator and if set, negating the
numerator before calling the unsigned division subroutine “Div48”. At
return of subroutine “Div48” the quotient is negated again if the
numerator was originally negative. The resulting sign of the remainder is
ignored. This subroutine is used to scale the instantaneous power by the
calibration coefficient and also to scale the content of the tariff buffer by
22500 before display.
Figure 3-8
shows Sdiv48 flow diagram
Figure 3-8. Sdiv48
test sign of dividend
negate 48-bit dividend
Y
positive
call Div48
unsigned divide
return
SDiv48
call Div48
unsigned divide
negate 48-bit quotient
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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