nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 93

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
8.4.9
CRC (Compare/Reload/Capture) register is a 16-bit wide register used by the Compare/Capture Unit asso-
ciated with Timer 2. CRCH holds higher byte and CRCL holds lower byte.
8.5
RTC2 contains two registers that can be used for capturing timer values; one loaded at positive edge of the
32KHz clock and another register clocked by the CPU clock for better resolution. Both registers are
updated as a consequence of an external event. RTC2 can also give an interrupt at predefined intervals
due to value equality between the timer and a compare register. RTC2 ensures that the functions the inter-
rupt is used for are woken up prior to the interrupt.
8.5.1
8.5.2
The following registers control RTC2.
Revision 1.1
Address
•
•
•
•
•
(Hex)
0xB3
32 KHz, sub-µA.
16-bit.
Linear.
Compare with interrupt (TICK). Resolution: 30.52 µs.
Capture with increased resolution: 125 ns.
RTC2
Compare/Reload/Capture register – CRCH, CRCL
Features
SFR registers
Name/Mnemonic
RTC2CON
sfrCapture
rtc2Config
Table 44. Compare/Reload/Capture register - CRCH, CRCL
Address
0xCA
0xCB
Bit
4:0
4
Reset
value
Reset value
0
0x00
0x00
93 of 191
Type
R/W RTC2 configuration register.
W
Trigger signal.
When the MCU writes a ‘1’ to this register field,
RTC2 will capture the timer value. The value is
stored in RTC2CPT00 and RTC2CPT01. An
additional counter clocked by the MCU clock will
at this point contain the number of MCU clock
cycles from the previous positive edge of the 32
KHz clock (edge detect @ MCU clock). The
value is stored in RTC2CPT1.
Register name
CRCL
CRCH
Description