24.3.1 Device Control Register

Note:
  1. In Target mode, the I3C operation is enabled only after providing SCL clocks to bring it out of Reset. This can be achieved by scheduling any transfer (placeholder transfer) ending in a STOP before initiating valid transfers. The placeholder transfer is ignored by the Target. Once enabled, the module responds to transfers on the bus only after it observes the Bus Available condition for I3CxBUSTIM[BUSAVAILTIM] * I3CxCTRL[IDLECNT] counts of the peripheral clock period.
  2. The Controller gets disabled after the commands in the command queue (if any) are executed, and the Controller is in the IDLE state.
Name: I3CxCTRL
Offset: 0x7A9000

Bit 3130292827262524 
 ONRESUMEABORTDMAENADPTVPECIDLECNT[1:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
        HOTJOIN 
Access R/W 
Reset 0 
Bit 76543210 
 I2CTGT      IBA 
Access R/WR/W 
Reset 00 

Bit 31 – ON  I3C Enable bit

ValueDescription
1 Enables the I3C operation(1).
0 Disables the I3C operation(2).

Bit 30 – RESUME  I3C Module Resume bit

ValueDescription
1 I3C module operation resume enable.
0 I3C module resume operation complete. Auto-cleared once the module resumes.

Bit 29 – ABORT  I3C Module Abort bit (Controller mode only)

This bit is used in the Controller mode of operation.
ValueDescription
1 Abort ongoing transaction. The Controller issues the STOP condition after the complete data byte is transferred or received.
0 Abort completed, auto-cleared once the transfer is aborted.

Bit 28 – DMAEN DMA Handshake Interface Enable bit

ValueDescription
1

Enables the DMA handshake control to interact with the DMA.
0

The DMA handshake control has no significance.

Bit 27 – ADPTV Adaptive mode bit (Target mode only)

ValueDescription
1 Hot-Join request is initiated only after it has switched to I3C mode of operation.
0 Initiates a Hot-Join always.

Bit 26 – PEC PEC Enable bit

ValueDescription
1 PEC support is enabled.
0 PEC support is not enabled.

Bits 25:24 – IDLECNT[1:0] Idle Count Multiplier bits (Target mode only)

ValueDescription
11 I3CxBUSTIM[BUSAVAILTIM] * 8
10 I3CxBUSTIM[BUSAVAILTIM] *4
01 I3CxBUSTIM[BUSAVAILTIM] * 2
00 I3CxBUSTIM[BUSAVAILTIM] * 1

Bit 8 – HOTJOIN Hot-Join ACK/NACK Control bit (Controller mode only)

ValueDescription
1 NACK and send broadcast CCC to disable Hot-Join.
0 ACK the Hot-Join request.

Bit 7 – I2CTGT (Controller mode only)

ValueDescription
1 I2C Target present.
0

I2C Target not present.

Bit 0 – IBA  I3C Broadcast Address Include bit (Controller mode only)

ValueDescription
1 I3C Broadcast Address is included for private transfers.
0 I3C Broadcast Address is not included for private transfers.