nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 77

• 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
Figure 10-6 : Timer 2 – Timer/Counter with Auto-Reload
10.8.3.5 Baud Rate Generator Mode
Setting either RCLK or TCLK to 1 configures Timer 2 to generate baud rates for
Serial port in serial mode 1 or 3. In baud-rate generator mode, Timer 2 functions in
auto-reload mode. However, instead of setting the TF2 flag, the counter overflow
generates a shift clock for the serial port function. As in normal auto-reload mode, the
overflow also causes the preloaded start value in the RCAP2L and RCAP2H registers
to be reloaded into the TL2 and TH2 registers.
When either TCLK = 1 or RCLK = 1, Timer 2 is forced into auto-reload operation,
regardless of the state of the CP/RL2 bit.
When operating as a baud rate generator, Timer 2 does not set the TF2 bit. In this
mode, a Timer 2 interrupt can be generated only by a high-to-low transition on the
t2ex pin setting the EXF2 bit, and only if enabled by EXEN2 = 1.The counter time
base in baud-rate generator mode is CPU_clk/2. To use an external clock source, set
C/T2 to 1 and apply the desired clock source to the t2 pin.
Figure 10-7 : Timer 2 – Baud Rate Generator Mode
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
July 2003
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