參數(shù)資料
型號: AN1759
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Add a Non-Volatile Clock to the MC68HC705J1A
中文描述: 添加非易失時(shí)鐘的MC68HC705J1A
文件頁數(shù): 17/24頁
文件大小: 316K
代理商: AN1759
Application Note
Flowcharts for the Test Interface
AN1759
17
Figure 13. TXD Subroutine
TXD
SET X = 8 AS A COUNTER
LEFT SHIFT ACCA, CARRY = MSB
DECREMENT X
CARRY = 1
YES
NO
SET SDA = 1
SET SDA = 0
X = 0, LOOP DONE
NO
YES
TOGGLE CLOCK
SCL = 1
SCL = 0
MAKE SDA AN INPUT
SCL = 1
SDA PIN = 0
NO ACK
YES
SLAVE SENT ACK
SCL = 0
MAKE SDA AN OUTPUT
A
A
RETURN FROM SUB
NO ACK ERROR LOOP
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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