參數(shù)資料
型號: AN2635
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: On-Chip FLASH Programming Routines
中文描述: 片上閃存編程例程
文件頁數(shù): 17/36頁
文件大小: 150K
代理商: AN2635
On-Chip Routines Flowcharts
On-Chip FLASH Programming Routines, Rev. 4
Freescale Semiconductor
17
Figure 2. GetBit Routine
( )
WHEN PTA0 = 0, C BIT = 0
GetBit
PUSH X TO STACK
PUSH A TO STACK
A = #OFFsetI
X = #SampPerBitI
ECGST BIT IN OSCSTAT = 1
(EXTERNAL CLOCK)
YES
NO
A = #OFFsetE
X = #SampPerBitE
READ PTA0
A
=
A – C
WHEN PTA0 = 1, C BIT = 1
DECREMENTED X = 0
YES
NO
ROTATE A LEFT THROUGH C BIT
C
C
A
(NOTE 1)
NOTES:
1. If rotated A is a negative value, a bit is logic 1.
PULL STACK DATA Y TO A
PULL STACK DATA X TO X
RTS
SerialE:
loopIn:
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