nRF24E1 Nordic VLSI, nRF24E1 Datasheet - Page 78

• 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
The nRF24E1 is configured with one serial port, which is identical in operation to the
standard 8051 serial port. The two serial port pins rxd and txd are available as
alternate functions of P0.1 and P0.2, for details please see ch. 3 I/O PORTS.
The serial port can operate in synchronous or asynchronous mode. In synchronous
mode, the nRF24E1 generates the serial clock and the serial port operates in half-
duplex mode. In asynchronous mode, the serial port operates in full-duplex mode. In
all modes, the nRF24E1 buffers receive data in a holding register, enabling the UART
to receive an incoming word before the software has read the previous value.
The serial port can operate in one of four modes, as outlined in Table 10-18
Mode
Table 10-18 : Serial Port Modes
The SFRs associated with the serial port are:
- SCON – SFR 0x98 – Serial port control (Table 10-20)
- SBUF – SFR 0x99 – Serial port buffer
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
0
1
2
3
Sync/A
sync
Sync
Async
Async
Async
Baud Clock
CPU_clk/4 or
CPU_clk/12
Timer 1 or
Timer 2
CPU_clk/32 or
CPU_clk/64
Timer 1 or
Timer 2
Data Bits
8
8
9
9
QhtrÃ&'ÂsÃ(&
Start/ Stop
None
1 start,
1 stop
1 start,
1 stop
1 start,
1 stop
9th Bit Function
None
None
0, 1, parity
0, 1, parity
July 2003