3.2.5 Core Mode Control Register(1)
Note:
- The Core More Control register (CORCON) has bits that control the operation of the DSP multiplier hardware.
| Name: | CORCON |
| Offset: | 0x010 |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| US | IPLST[2:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SATA | SATB | SATDW | ACCSAT | RND | IF | ||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 |
Bit 12 – US Unsigned or Signed Multiplier Mode Select bit
| Value | Description |
|---|---|
1 |
Unsigned mode enabled for DSP ops |
0 |
Signed mode enabled for DSP ops |
Bits 10:8 – IPLST[2:0] Interrupt Priority Level Supervisor Mode Threshold bits
Supervisor Mode: The bits are R/W-0 (CPU will reset into Supervisor mode)
| Value | Description |
|---|---|
| 111 | No interrupts will execute in Supervisor mode. |
| 110 | Level 7 interrupts will execute in Supervisor mode. |
| 101 | Level 6 and 7 interrupts will execute in Supervisor mode. |
| 100 | Level 5 through 7 interrupts will execute in Supervisor mode. |
| 011 | Level 4 through 7 interrupts will execute in Supervisor mode. |
| 010 | Level 3 through 7 interrupts will execute in Supervisor mode. |
| 001 | Level 2 through 7 interrupts will execute in Supervisor mode. |
| 000 | Level 1 through 7 interrupts will execute in Supervisor mode. |
Bit 7 – SATA AccA Saturation Enable bit
| Value | Description |
|---|---|
1 |
Accumulator A saturation enabled |
0 |
Accumulator A saturation disabled |
Bit 6 – SATB AccB Saturation Enable bit
| Value | Description |
|---|---|
1 |
Accumulator B saturation enabled |
0 |
Accumulator B saturation disabled |
Bit 5 – SATDW Data Space Write from DSP Engine Saturation Enable bit
| Value | Description |
|---|---|
1 |
Data Space write saturation enabled |
0 |
Data Space write saturation disabled |
Bit 4 – ACCSAT Accumulator Saturation Mode Select bit
| Value | Description |
|---|---|
1 |
9.63 saturation (super saturation) |
0 |
1.63 saturation (normal saturation) |
Bit 1 – RND Rounding Mode Select bit
| Value | Description |
|---|---|
1 |
Biased (conventional) rounding enabled |
0 |
Unbiased (convergent) rounding enabled |
Bit 0 – IF Integer or Fractional Multiplier Mode Select bit
| Value | Description |
|---|---|
1 |
Integer mode is enabled for DSP multiply. |
0 |
Fractional mode is enabled for DSP multiply. |