Atmel SAM4L-EK Atmel ATSAM4L-EK ATSAM4L-EK Data Sheet
Product codes
ATSAM4L-EK
459
42023E–SAM–07/2013
ATSAM4L8/L4/L2
19.6
User Interface
Note:
1. The reset values are device specific. Refer to the Module Configuration section at the end of this chapter.
2. The number of Alarm and Periodic Interval registers are device specific. Refer to the Module Configuration section at the
end of this chapter.
Table 19-1.
AST Register Memory Map
Offset
Register
Register Name
Access
Reset
0x00
Control Register
CR
Read/Write
0x00000000
0x04
Counter Value
CV
Read/Write
0x00000000
0x08
Status Register
SR
Read-only
0x00000000
0x0C
Status Clear Register
SCR
Write-only
0x00000000
0x10
Interrupt Enable Register
IER
Write-only
0x00000000
0x14
Interrupt Disable Register
IDR
Write-only
0x00000000
0x18
Interrupt Mask Register
IMR
Read-only
0x00000000
0x1C
Wake Enable Register
WER
Read/write
0x00000000
0x20
Alarm Register 0
AR0
Read/Write
0x00000000
0x24
Alarm Register 1
AR1
Read/Write
0x00000000
0x30
Periodic Interval Register 0
PIR0
Read/Write
0x00000000
0x34
Periodic Interval Register 1
PIR1
Read/Write
0x00000000
0x40
Clock Control Register
CLOCK
Read/Write
0x00000000
0x44
Digital Tuner Register
DTR
Read/Write
0x00000000
0x48
Event Enable
EVE
Write-only
0x00000000
0x4C
Event Disable
EVD
Write-only
0x00000000
0x50
Event Mask
EVM
Read-only
0x00000000
0x54
Calendar Value
CALV
Read/Write
0x00000000
0xF0
Parameter Register
PARAMETER
Read-only
-
0xFC
Version Register
VERSION
Read-only
-