nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 76

• Manufacturer Part Number: nRF24E1
• Description: 2.4Ghz RF Transceiver With Embedded 8051 Compatible Microcontroller And 9 Input, 10 Bit ADC
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
RCLK
0
0
1
X
X
Table 10-17 : Timer 2 Mode Control Summary
10.8.3.2 16-Bit Timer/Counter Mode
Figure 10-5 : Timer 2 – Timer/Counter with Capture illustrates how Timer 2 operates
in timer/counter mode with the optional capture feature. The C/T2 bit determines
whether the 16-bit counter counts clock cycles (divided by 4 or 12), or high-to-low
transitions on the t2 pin. The TR2 bit enables the counter. When the count increments
from 0xFFFF, the TF2 flag is set, and t2_out goes high for one clock cycle.
Figure 10-5 : Timer 2 – Timer/Counter with Capture
10.8.3.3 16-Bit Timer/Counter Mode with Capture
The Timer 2 capture mode, illustrated in Figure 10-5 : Timer 2 – Timer/Counter with
Capture, is the same as the 16-bit timer/counter mode, with the addition of the capture
registers and control signals. The CP/RL2 bit in the T2CON SFR enables the capture
feature. When CP/RL2 = 1, a high-to-low transition on t2ex when EXEN2 = 1 causes
the Timer 2 value to be loaded into the capture registers (RCAP2L and RCAP2H).
10.8.3.4 16-Bit Timer/Counter Mode with Auto-Reload
When CP/RL2 = 0, Timer 2 is configured for the auto-reload mode illustrated in
Figure 10-6 : Timer 2 – Timer/Counter with Auto-Reload. Control of counter input is
the same as for the other 16-bit counter modes. When the count increments from
0xFFFF, Timer 2 sets the TF2 flag and the starting value is reloaded into TL2 and
TH2. The software must preload the starting value into the RCAP2L and RCAP2H
registers.
When Timer 2 is in auto-reload mode, a reload can be forced by a high-to-low
transition on the t2ex pin, if enabled by EXEN2 = 1.
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
TCLK
0
0
X
1
X
CP/RL2
1
0
X
X
X
TR2
1
1
1
1
0
QhtrÃ&%ÂsÃ(&
Mode
16-bit timer/counter with capture
16-bit timer/counter with auto-reload
Baud-rate generator
Baud-rate generator
Off
July 2003