Datasheet

35
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
11. Peripherals Configuration Overview
The following table shows an overview of all the peripherals in the device. The IRQ Line column shows the interrupt
mapping, as described in “Nested Vector Interrupt Controller” on page 25.
The AHB and APB clock indexes correspond to the bit in the AHBMASK and APBMASK (x = A, B or C) registers in the
Power Manager, while the Enabled at Reset column shows whether the peripheral clock is enabled at reset (Y) or not
(N). Refer to the Power Manager AHBMASK, APBAMASK, APBBMASK and APBCMASK registers for details.
The Generic Clock Index column corresponds to the value of the Generic Clock Selection ID bits in the Generic Clock
Control register (CLKCTRL.ID) in the Generic Clock Controller. Refer to the GCLK CLKCTRL register description for
details.
The PAC Index column corresponds to the bit in the PACi (i = 0, 1 or 2) registers, while the Prot at Reset column shows
whether the peripheral is protected at reset (Y) or not (N). Refer to “PAC – Peripheral Access Controller” on page 28 for
details.
The numbers in the Events User column correspond to the value of the User Multiplexer Selection bits in the User
Multiplexer register (USER.USER) in the Event System. See the USER register description and Table 22-6 for details.
The numbers in the Events Generator column correspond to the value of the Event Generator bits in the Channel register
(CHANNEL.EVGEN) in the Event System. See the CHANNEL register description and Table 22-3 for details.
Table 11-1. Peripherals Configuration Overview
Peripheral
Name
Base
Address
IRQ
Line
AHB Clock APB Clock Generic Clock PAC Events
Index
Enabled
at Reset
Index
Enabled
at Reset
Index Index
Prot at
Reset
User Generator
AHB-APB
Bridge A
0x40000000 0 Y
PAC0 0x40000000 0 Y
PM 0x40000400 0 1 Y 1 N
SYSCTRL 0x40000800 1 2 Y
0: DFLL48M
reference
2 N
GCLK 0x40000C00 3 Y 3 N
WDT 0x40001000 2 4 Y 1 4 N
RTC 0x40001400 3 5 Y 2 5 N
1: CMP0/ALARM0
2: CMP1
3: OVF
4-11: PER0-7
EIC 0x40001800
NMI,
4
6 Y 3 6 N 12-27: EXTINT0-15
AHB-APB
Bridge B
0x41000000 1 Y
PAC1 0x41000000 0 Y
DSU 0x41002000 3 Y 1 Y 1 Y
NVMCTRL 0x41004000 5 4 Y 2 Y 2 N
PORT 0x41004400 3 Y 3 N
AHB-APB
Bridge C
0x42000000 2 Y
PAC2 0x42000000 0 N
EVSYS 0x42000400 6 1 N
4-11: one per
CHANNEL
1 N
SERCOM0 0x42000800 7 2 N
13: CORE
12: SLOW
2 N
SERCOM1 0x42000C00 8 3 N
14: CORE
12: SLOW
3 N
SERCOM2 0x42001000 9 4 N
15: CORE
12: SLOW
4 N
SERCOM3 0x42001400 10 5 N
16: CORE
12: SLOW
5 N