nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 80

• 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 10-8 : Serial Port Mode 0 receive timing for low-speed (CPU_clk/12)
operation.
Figure 10-9 : Serial Port Mode 0 receive timing for high-speed (CPU_clk/4) operation
Figure 10-10 : Serial Port Mode 0 transmit timing for high-speed (CPU_clk/4)
operation
Figure 10-11 : Serial Port Mode 0 transmit timing for high-speed (CPU_clk/4)
operation
Mode 1 provides standard asynchronous, full-duplex communication, using a total
of ten bits: one start bit, eight data bits, and one stop bit. For receive operations, the
stop bit is stored in RB8. Data bits are received and transmitted LSB first.
10.9.2.1 Mode 1 Baud Rate
The mode 1 baud rate is a function of timer overflow. Serial port can use either
Timer 1 or Timer 2 to generate baud rates. Each time the timer increments from its
maximum count (0xFF for Timer 1 or 0xFFFF for Timer 2), a clock is sent to the
baud-rate circuit. The clock is then divided by 16 to generate the baud rate. When
using Timer 1, the SMOD bit selects whether or not to divide the Timer 1 rollover rate
by 2. Therefore, when using Timer 1, the baud rate is determinedby the equation:
2
Baud Rate =
x Timer 1 Overflow
32
SMOD is SFR bit PCON.7
When using Timer 2, the baud rate is determined by the equation:
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
July 2003
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