24.3.8 Queue Threshold Control
Register
| Name: | I3CxQUETHLDCON |
| Offset: | 0x7A901C |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| | IBISTATHLD[7:0] | |
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| | IBIDATTHLD[7:0] | |
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| | RESPBUFTHLD[7:0] | |
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| | CMDEBTHLD[7:0] | |
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bits 31:24 – IBISTATHLD[7:0] In-Band Interrupt
Status Threshold Value bits
This field controls
the number of IBI status entries (or greater) in the IBI queue that trigger the
IBITHLDSTA interrupt. The valid range is 0 to 7. A value of 0 sets the threshold for
1 entry, and a value of N sets the threshold for N+1 entries. Each IBI status entry
can represent the complete (IBI payload byte size ≤ 4* IBIDATTHLD) IBI payload or a
segment (IBI payload byte size > 4* IBIDATTHLD) of the IBI payload.
Bits 23:16 – IBIDATTHLD[7:0] IBI Data Threshold
Value bits
This field represents the IBI
data segment size in DWORD (4 bytes). The minimum supported segment size is 1 (4
bytes), and the maximum supported size is 31. The IBIDATTHLD field enables the
slicing of the incoming IBI data and generates individual status, promoting the
cut-through operation in reading out the IBI data.
Bits 15:8 – RESPBUFTHLD[7:0] Response Buffer
Threshold Value bits
Controls the number of entries
(or greater) in the Response Queue that trigger the RESPQSTA interrupt. The valid
range is 0 to 3. The software programs only valid values. A value of 0 sets the
threshold for 1 entry, and a value of N sets the threshold for N+1
entries.
Bits 7:0 – CMDEBTHLD[7:0] Command Buffer
Empty Threshold Value bits
Controls the number of empty
locations (or greater) in the Command Queue that trigger the CMDQSTA interrupt. The
valid range is 0 to 7. A value of N ranging from 1 to 7 sets the threshold to N
empty locations, and a value of 0 sets the threshold to indicate that the queue is
completely empty.
