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參數(shù)資料
| 型號： | MC68HC11N4 |
| 廠商： | Motorola, Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-Bit microcontroller(8位微控制器) |
| 中文描述： | 8位微控制器（8位微控制器） |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 261K |
| 代理商： | MC68HC11N4 |
MOTOROLA
8
AN1215/D
Figure 3 ALU Data Register Format
ASSEMBLY LANGUAGE IMPLEMENTATION
The assembly language version of the PID control routine consists of a C master program and an assembly
subroutine (DOPID) that carries out all time-critical tasks (see Appendix B for a complete listing). The C
master program is used for convenience — DOPID can be made to stand alone with minor changes in vari-
able definition.
The constant and variable number representation for the assembly version of the PID loop is a four-byte
number consisting of a 16-bit integer, an implied decimal point, and a 16-bit fraction. This representation
was chosen to provide relatively high performance while giving enough precision to support MC68HC11N4
8-, 12-, and 16-bit PWM resolutions. Many other formats could be used, each with a particular trade-off be-
tween precision and time.
CREG FAN1215
16-BIT SIGNED INTEGER NUMBER
16-BIT FRACTION NUMBER AFTER FDIV
32-BIT SIGNED INTEGER AND FRACTION FOLLOWING AN FDIV
S
AREG or BREG
SIGN BIT
RADIX POINT
0
15
INTEGER
-32768
TO
32767
32-BIT SIGNED INTEGER NUMBER
CREG LOW
SIGN BIT IS IN INTEGER PART OR NEG FLAG
-16
-1
FRACTION
RADIX POINT
0.00000
TO
0.99998
S
CREG HIGH
SIGN BIT
RADIX POINT
CREG
-16
0
15
INTEGER
FRACTION
-32768.99998
TO
+32767.99998
-1
CREG LOW
S
CREG
SIGN BIT
RADIX POINT
-2147483648
TO
+2147483647
0
15
31
INTEGER
CREG HIGH
CREG LOW
16
LONG WORD SIGNED RESULT AFTER FDIV FOLLOWING AN IDIV
CREG LOW AFTER FDIV
FRACTION
RADIX POINT
CREG
S
CREG HIGH AFTER FDIV
SIGN BIT
INTEGER
S
CREG
SIGN BIT
RADIX POINT
INTEGER
CREG HIGH AFTER IDIV
CREG LOW AFTER IDIV
0
15
31
16
-16
0
15
-1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1CAG | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC16Z1CAG16 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG16 | 制造商:Freescale Semiconductor 功能描述:IC16-BIT MICROCONTROLLER |
| MC68HC16Z1CAG20 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG20 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
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