参数资料
型号: PIC12CE67
厂商: Microchip Technology Inc.
英文描述: 8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory
中文描述: 8引脚,8位CMOS微控制器与A / D转换器和EEPROM数据存储器
文件页数: 26/44页
文件大小: 935K
代理商: PIC12CE67
Tips ‘n Tricks
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TIP #15 Delay Techniques
Use GOTO "next instruction" instead of two
NOPs.
Use CALL Rtrn as quad, 1 instruction NOP
(where "Rtrn" is the exit label from existing
subroutine).
MCUs are commonly used to interface with the
“outside world” by means of a data bus, LED’s,
buttons, latches, etc. Because the MCU runs at a
fixed frequency, it will often need delay routines to
meet setup/hold times of other devices, pause for
a handshake or decrease the data rate for a
shared bus.
Longer delays are well-suited for the DECFSZ and
INCFSZ instructions where a variable is
decremented or incremented until it reaches zero
when a conditional jump is executed. For shorter
delays of a few cycles, here a few ideas to
decrease code size.
NOP
GOTO
$+1
CALL Rtrn ;1 instruction, 4 cycles
Rtrn
RETURN
. . .
;2 instructions, 2 cycles
;1 instruction, 2 cycles
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PIC12CE673-04/JM 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter
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