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: 添加非易失時鐘的MC68HC705J1A
文件頁數(shù): 18/24頁
文件大?。?/td> 316K
代理商: AN1759
Application Note
AN1759
18
Figure 14. RXD/RXD_LAST Subroutines
RXD/RXD_LAST
MAKE SDA AN INPUT
SCL=1
X = 0
YES, RECEIVED 8-BIT DATA
NO
SDA PIN = 0
CARRY BIT = SDA
YES
NO
ROTATE LEFT ACCA
PUTS CARRY BIT INTO ACCA MSB
SCL = 0
MAKE SDA AN OUTPUT
SDA = 0
SET X = 8 AS A COUNTER
DECREMENT X
TOGGLE CLOCK
SCL=1
SCL=0
RETURN FROM SUB
RXD — ACK WITH SDA = 0
RXD_LAST — NO ACK WITH SDA = 1
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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