SDA6000 Datasheet, PDF (260/380 Pages) Infineon Technologies AG – Teletext Decoder with Embedded 16-bit Controller

SDA 6000
I²C Status Register ICST
Peripherals
Reset Value: 0000_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RM
EN
0
0
0
0
CO
IRQ
E
IRQ
P
IRQ
D
BB
LRB SLA
AL
ADR
Field
ADR
AL
SLA
LRB
Bits Type Value Description
0
rh
–
Address
Bit ADR is set after a start condition in slave
mode until the address has been received
(1 byte in 7-bit address mode, 2 bytes in
10-bit address mode).
1
rwh –
Arbitration Lost
Bit AL is set when the I²C module has tried
to become master on the bus, but has lost
the arbitration. Operation is continued until
the 9th clock pulse.
If multimaster mode is selected the I²C
module temporarily switches to slave mode
after a lost arbitration. Bit IRQP is set along
with bit AL.
AL must be cleared via software.
2
rh
0
1
Slave
The I²C module is not selected as a slave,
or the module is in master mode.
The I²C module has been selected as a
slave (device address received).
3
rh
–
Last Received Bit
Bit LRB represents the last bit (i.e. the
acknowledge bit) of the last transferred
frame.
It is automatically set to zero by a write or
read access to the buffer ICRTB0 … 3.
Note: If LRB is high (no acknowledge) in
slave mode, TRX bit is set automatically.
Users Manual
7 - 109
2000-06-15