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參數(shù)資料
| 型號(hào)： | 8XC552 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 FAMILY DERIVATIVES |
| 中文描述： | 80C51系列衍生物 |
| 文件頁數(shù)： | 23/60頁 |
| 文件大?。?/td> | 382K |
| 代理商： | 8XC552 |
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Philips Semiconductors
80C51 Family Derivatives
8XC552/562 overview
1996 Aug 06
23
Table 3.
Master Transmitter Mode
STATUS
CODE
(S1STA)
STATUS OF THE
I
2
C BUS AND
SIO1 HARDWARE
APPLICATION SOFTWARE RESPONSE
TO/FROM S1DAT
TO S1CON
NEXT ACTION TAKEN BY SIO1 HARDWARE
STA
STO
SI
AA
08H
A START condition has
been transmitted
Load SLA+W
X
0
0
X
SLA+W will be transmitted;
ACK bit will be received
10H
A repeated START
condition has been
transmitted
Load SLA+W or
Load SLA+R
X
X
0
0
0
0
X
X
As above
SLA+W will be transmitted;
SIO1 will be switched to MST/REC mode
18H
SLA+W has been
transmitted; ACK has
been received
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
1
0
1
0
0
1
1
0
0
0
0
X
X
X
X
Data byte will be transmitted;
ACK bit will be received
Repeated START will be transmitted;
STOP condition will be transmitted;
STO flag will be reset
STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
20H
SLA+W has been
transmitted; NOT ACK
has been received
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
1
0
1
0
0
1
1
0
0
0
0
X
X
X
X
Data byte will be transmitted;
ACK bit will be received
Repeated START will be transmitted;
STOP condition will be transmitted;
STO flag will be reset
STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
28H
Data byte in S1DAT has
been transmitted; ACK
has been received
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
1
0
1
0
0
1
1
0
0
0
0
X
X
X
X
Data byte will be transmitted;
ACK bit will be received
Repeated START will be transmitted;
STOP condition will be transmitted;
STO flag will be reset
STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
30H
Data byte in S1DAT has
been transmitted; NOT
ACK has been received
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
1
0
1
0
0
1
1
0
0
0
0
X
X
X
X
Data byte will be transmitted;
ACK bit will be received
Repeated START will be transmitted;
STOP condition will be transmitted;
STO flag will be reset
STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
38H
Arbitration lost in
SLA+R/W or
Data bytes
No S1DAT action or
No S1DAT action
0
1
0
0
0
0
X
X
I
2
C bus will be released;
not addressed slave will be entered
A START condition will be transmitted when the
bus becomes free
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