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HS I
2
C Register Manual
Bits
Field Name
Description
Type
Reset
Write
Clear this bit to 0.
0x1:
5
GC
General Call IRQ status. Set to 1 when general call
RW
0
address detected. Interrupt signaled to MPU subsystem
Read
No general call detected
0x0:
Read
General call address detected
0x1:
Write
No effect
0x0:
Write
Clear this bit to 0.
0x1:
4
XRDY
Transmit Data Ready IRQ status. Set to 1 in transmit
RW
0
mode when new data is requested for transmission.
When this bit is set to 1, an interrupt is signaled to MPU
subsystem
Read
No transmit data is requested for transmission
0x0:
Read
Transmit data is requested for transmission
0x1:
Write
No effect
0x0:
Write
Clear this bit to 0.
0x1:
3
RRDY
Receive Data Ready IRQ status. Set to 1 when in
RW
0
receive mode, causing new data to be able to be read.
When this bit is set to 1, an interrupt is signaled to MPU
subsystem.
Read
No data available
0x0:
Read
Receive data available
0x1:
Write
No effect
0x0:
Write
Clear this bit to 0.
0x1:
2
ARDY
Register Access Ready IRQ status. Setting this bit to 1
RW
0
indicates that previous access has been performed and
registers are ready to be accessed again. An interrupt is
signaled to MPU subsystem.
Read
Module busy
0x0:
Read
Access ready
0x1:
Write
No effect
0x0:
Write
Clear this bit to 0.
0x1:
1
NACK
No Acknowledgment IRQ status. This bit is set when No
RW
0
Acknowledgment has been received. An interrupt is
signaled to MPU subsystem.
In master mode, the transfer is automatically ended by
generating a stop condition on the bus. The
I2Ci.
[1] STP, I2Ci.
[10] MST and
[9] TRX bits are automatically cleared to 0
(slave receiver mode). TX and RX FIFOs must be
cleared (I2Ci.
[6] TXFIFO_CLR and
[14] RXFIFO_CLR bits set to 1).
Read
Normal operation
0x0:
2823
SWPU177N – December 2009 – Revised November 2010
Multimaster High-Speed I
2
C Controller
Copyright © 2009–2010, Texas Instruments Incorporated