UG-498
ADuCM320 Hardware Reference Manual
Rev. C | Page 44 of 196
REGISTER SUMMARY: VDAC
The CPU accesses the VDAC circuit over a die to die interface (D2D), which increases the execution times of ldr and str instructions. The
32-bit MMRs have addresses of 0x40086xxx and take 8 CPU cycles at 80 MHz to execute. The 16-bit MMRs have addresses of 0x40082xxx
and take 6 CPU cycles at 80 MHz to execute.
Table 36. VDAC Register Summary
Address
Name
Description
Reset
RW
0x40082400
DAC0CON
DAC0 control register
0x0100
RW
0x40082404
DAC1CON
DAC1 control register
0x0100
RW
0x40082408
DAC2CON
DAC2 control register
0x0100
RW
0x4008240C
DAC3CON
DAC3 control register
0x0100
RW
0x40082410
DAC4CON
DAC4 control register
0x0100
RW
0x40082414
DAC5CON
DAC5 control register
0x0100
RW
0x40082418
DAC6CON
DAC6 control register
0x0100
RW
0x4008241C
DAC7CON
DAC7 control register
0x0100
RW
0x40086404
DAC0DAT
DAC0 data register
0x00000000
RW
0x40086408
DAC1DAT
DAC1 data register
0x00000000
RW
0x4008640C
DAC2DAT
DAC2 data register
0x00000000
RW
0x40086410
DAC3DAT
DAC3 data register
0x00000000
RW
0x40086414
DAC4DAT
DAC4 data register
0x00000000
RW
0x40086418
DAC5DAT
DAC5 data register
0x00000000
RW
0x4008641C
DAC6DAT
DAC6 data register
0x00000000
RW
0x40086420
DAC7DAT
DAC7 data register
0x00000000
RW
REGISTER DETAILS: VDAC
DAC0 Control Register
Address: 0x40082400, Reset: 0x0100, Name: DAC0CON
Table 37. Bit Descriptions for DAC0CON
Bits
Bit Name
Description
Reset
Access
[15:9]
RESERVED
Reserved.
0x0
R
8
PD
DAC0 power down.
0x1
RW
0: DAC0 is powered up
1: DAC0 is powered down and output is floating
[7:5]
RESERVED
Reserved.
0x0
RW
4
EN
DAC0 enable. Must be set to 1.
0x0
RW
0: DAC disable. Clear DAC data immediately
1: DAC enable.
[3:2]
RESERVED
Reserved.
0x0
RW
[1:0]
RN
DAC0 reference selection. These bits set the DAC range. A write to these
bits has immediate effect on the DAC.
0x0
RW
00: internal reference
01: reserved
10: reserved
11: AVDD/AGND
DAC1 Control Register
Address: 0x40082404, Reset: 0x0100, Name: DAC1CON
Table 38. Bit Descriptions for DAC1CON
Bits
Bit Name
Description
Reset
Access
[15:9]
RESERVED
Reserved.
0x0
R
8
PD
DAC1 power down.
0x1
RW
0: DAC1 is powered up
1: DAC1 is powered down and output is floating