Datasheet
416
32117D–AVR-01/12
AT32UC3C
21.7 User interface
Table 21-1. MDMA Register Memory Map
Offset Register Register Name Channel Access Reset
0x00 Control Register CR - Read/Write 0x00000000
0x04 Interrupt Enable Register IER - Write-only 0x00000000
0x08 Interrupt Disable Register IDR - Write-only 0x00000000
0x0C Interrupt Mask Register IMR - Read-only 0x00000000
0x10 Interrupt Status Register ISR - Read-only 0x00000000
0x14 Interrupt Clear Register ICR - Write-only 0x00000000
0x18 Parameter Register PR - Read-only -
(1)
1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Note: The number of DMA channels is device-specific. Not all devices will implement all four channels. These devices will not imple-
ment all user interface registers. Unimplemented registers will always read as 0.
0x1C Version Register VR - Read-only -
(1)
0x20 Descriptor Start Address 0 DSAR0 0 Read/Write 0x00000000
0x24 Descriptor Start Address 1 DSAR1 1 Read/Write 0x00000000
0x28 Descriptor Start Address 2 DSAR2 2 Read/Write 0x00000000
0x2C Descriptor Start Address 3 DSAR3 3 Read/Write 0x00000000
0x30-3C RESERVED - - Read-only 0x00000000
0x40 Current Descriptor Address Register 0 CDAR0 0 Read/Write 0x00000000
0x44 Read Address Register 0 RAR0 0 Read/Write 0x00000000
0x48 Write Address Register 0 WAR0 0 Read/Write 0x00000000
0x4C Channel Control Register 0 CCR0 0 Read/Write 0x00000000
0x50 Current Descriptor Address Register 1 CDAR1 1 Read/Write 0x00000000
0x54 Read Address Register 1 RAR1 1 Read/Write 0x00000000
0x58 Write Address Register 1 WAR1 1 Read/Write 0x00000000
0x5C Channel Control Register 1 CCR1 1 Read/Write 0x00000000
0x60 Current Descriptor Address Register 2 CDAR2 2 Read/Write 0x00000000
0x64 Read Address Register 2 RAR2 2 Read/Write 0x00000000
0x68 Write Address Register 2 WAR2 2 Read/Write 0x00000000
0x6C Channel Control Register 2 CCR2 2 Read/Write 0x00000000
0x70 Current Descriptor Address Register 3 CDAR3 3 Read/Write 0x00000000
0x74 Read Address Register 3 RAR3 3 Read/Write 0x00000000
0x78 Write Address Register 3 WAR3 3 Read/Write 0x00000000
0x7C Channel Control Register 3 CCR3 3 Read/Write 0x00000000