Table of Contents
Advertisement
1
SRS
Slave Read Needs Service
1. If IICO_MDCNTL[HSCL]=O and
°
Normal operation or slave read does not
IICO_SDBUF contains no data, the slave
need service.
will issue a NACK and
1 IICO_SDBUF is empty, and a read
IICO_XTCNTLSS[SRS] is set.
operation was requested on the IIC bus.
2. If ICOMDCNTL[HSCL]=O, and
The set condition may also indicate that
IICO_SDBUF contains data, the slave will
IICO_SDBUF is empty due to a slave read
send the data. IICO_XTCNTLSS[SRS] is
and additional data is requested by the
not set unless the master request
master.
additional data.
3. If IICO_MDCNTL[HSCL]=O, and
IICO_SDBUF contains no data, the slave
will hold IICSCL low to indicate the slave is
busy. IICO_XTCNTLSS[SRS] is set until the
IICO_SDBUF .is filled. Once filled, IICSCL is
released, IICO_XTCNTLSS[SRS] is
cleared, and the slave sends the data.
4. If IICO_MDCNTL[HSCL]=1, and
IICO_SDBUF contains data, the slave will
send the data. IICO_XTCNTLSS[SRS] is
not set unless the master requests
additional data. .
2
SWC
Slave Write Complete
°
Normal operation or slave write in
progress.
1 A Stop signal was received during a write
operation, or a repeated Start condition
ended a write operation.
3
SWS
Slave Write Needs Service
1. If IICO_MDCNTL[HSCL]
=
1 and
°
Normal operation or slave write does not
IICO_SDBUF is full, the slave will hold
need service.
IICSCL low to indicate the slave is busy.
1 IICO_SDBUF is full during a slave write.
IICO_XTCNTLSS[SWS] is set until
IICO_SDBUF is empty. Once empty,
IICSCL is released,
IICO_XTCNTLSS[SWS] is cleared, and the
slave receives the data.
2. If IICO_MDCNTL[HSCL]
=
°
and
IICO_SDBUF is full, the slave will issue a
NACK and IICO_XTCNTLSS[SWS] is set.
4
SBDD
Slave Data Buffer Has Data
Read-only
°
IICO_SDBUF is empty
1 IICO_SDBUF contains data
5
SDBF
Slave Data Buffer Full
Read-only
°
IICO_SDBUF is not full
1 IICO_SDBUF is full
Preliminary
IIC Bus Interface
22-19
Advertisement
Chapters
Table of Contents
