at94k05al-25aqi ATMEL Corporation, at94k05al-25aqi Datasheet - Page 140
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at94k05al-25aqi
Manufacturer Part Number
at94k05al-25aqi
Description
5k - 40k Gates Of At40k Fpga With 8-bit Microcontroller, Up To 36k Bytes Of Sram And On-chip Jtag Ice
Manufacturer
ATMEL Corporation
Datasheet
1.AT94K05AL-25AQI.pdf
(192 pages)
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Table 41. Status Codes for Master Receiver Mode
140
(TWSR)
Status
Code
$08
$10
$38
$40
$48
$50
$58
AT94K Series FPSLIC
Status of the 2-wire
Serial Bus and 2-wire
Serial Hardware
A START condition has
been transmitted
A repeated START
condition has been
transmitted
Arbitration lost in
SLA+R or NOT ACK bit
SLA+R has been
transmitted;
ACK has been received
SLA+R has been
transmitted;
NOT ACK has been
received
Data byte has been
received;
ACK has been returned
Data byte has been
received;
NOT ACK has been
returned
To/From TWDR
Load SLA+R
Load SLA+R or
Load SLA+W
No TWDR action or
No TWDR action
No TWDR action or
No TWDR action
No TWDR action or
No TWDR action or
No TWDR action
Read data byte or
Read data byte
Read data byte or
Read data byte or
Read data byte
Application Software Response
STA
X
X
X
0
1
0
0
1
0
1
0
0
1
0
1
STO
0
0
0
0
0
0
0
0
1
1
0
0
0
1
1
To TWCR
TWINT
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TWEA
X
X
X
X
X
X
X
X
X
X
X
0
1
0
1
Next Action Taken by 2-wire Serial
Hardware
SLA+R will be transmitted
ACK or NOT ACK will be received
SLA+R will be transmitted
ACK or NOT ACK will be received
SLA+W will be transmitted
Logic will switch to Master Transmitter mode
2-wire serial bus will be released and not
addressed Slave mode will be entered
A START condition will be transmitted when
the bus becomes free
Data byte will be received and NOT ACK will
be returned
Data byte will be received and ACK will be
returned
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO flag will be reset
STOP condition followed by a START
condition will be transmitted and TWSTO flag
will be reset
Data byte will be received and NOT ACK will
be returned
Data byte will be received and ACK will be
returned
Repeated START will be transmitted
STOP condition will be transmitted and
TWSTO flag will be reset
STOP condition followed by a START
condition will be transmitted and TWSTO flag
will be reset
Rev. 1138F–FPSLI–06/02
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