nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 108

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
11.3.2
The PWRDWN register is used by the MCU to set the system to a power saving mode:
Revision 1.1
Addr
0xA4
Note: If a source for CLKLF is selected, the MCU system will not start unless CLKLF is operative.
Bit
4:3
2:0
7
6
5
For example, when selecting CLKLF from IO pin the external clock must be active for the
MCU to wake up by pin from memory retention.
Power down control – PWRDWN
R/W
W
R
R
R
R
Indicates a wakeup from pin if set
This bit is either cleared by a read or by entering a power down mode
Indicates a wakeup from TICK if set
This bit is either cleared by a read or by entering a power down mode
Indicates a wakeup from Comparator if set
This bit is either cleared by a read or by entering a power down mode
Reserved
Set system to power down if different from 000
001: set system to DeepSleep
010: set system to Memory retention, timer off
011: set system to Memory retention, timer on
100: set system to Register retention
101: reserved
110: reserved
111: set system to standby (stop MCU clock)
Shows previous power down mode
000: Power off
001: DeepSleep
010: Memory retention, timer off
011: Memory retention, timer on
100: Register retention
101: reserved
110: reserved
111: standby
Table 59. PWRDWN register
108 of 191
Function
Reset value: 0x00