at94k40al ATMEL Corporation, at94k40al Datasheet - Page 157

• Manufacturer Part Number: at94k40al
• Description: At94kal Series Field Programmable System Level Integrated Circuit
• Manufacturer: ATMEL Corporation

Figure 4-51. Formats and States in the Slave Transmitter Mode
Table 4-33.
1138I–FPSLI–1/08
(TWSR)
Status
Code
$F8
$00
Reception of the own
slave address and one or
more data bytes
Arbitration lost as master
and addressed as slave
Last data byte transmitted.
No relevant state
information available;
TWINT = “0”
Bus error due to an
illegal START or STOP
condition
Serial Bus and 2-wire
Status of the 2-wire
Status Codes for Miscellaneous States
Serial Hardware
From master to slave
From slave to master
S
No TWDR action
No TWDR action
To/From TWDR
SLA
Application Software Response
R
DATA
STA
$A8
$B0
0
A
A
n
No TWCR action
STO
A
1
To TWCR
DATA
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the 2-wire serial bus
TWINT
1
AT94KAL Series FPSLIC
$B8
TWEA
A
X
DATA
Wait or proceed current transfer
Only the internal hardware is affected; no
STOP condition is sent on the bus. In all
cases, the bus is released and TWSTO is
cleared.
Next Action Taken by 2-wire
$C0
$C8
A
A
Serial Hardware
P or S
All 1's
P or S
157