NRF9E5 NORDIC SEMICONDUCTOR, NRF9E5 Datasheet - Page 87

• Manufacturer Part Number: NRF9E5
• Description: TRX, 430-928MHZ, MCU/ADC/PWM, SMD
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF9E5

• Receiving Current: 12.5mA
• Transmitting Current: 30mA
• Data Rate: 50Kbps
• Frequency Range: 430MHz To 928MHz
• Modulation Type: GFSK
• Rf Ic Case Style: QFN
• No. Of Pins: 32
• Supply Voltage Range: 1.9V To
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PRODUCT SPECIFICATION
nRF9E5 Single Chip Transceiver with Embedded Microcontroller and ADC
To use Timer 2 as the baud-rate generator, configure Timer 2 in auto-reload mode and
set the TCLK and/or RCLK bits in the T2CON SFR. TCLK selects Timer 2 as the baud-
rate generator for the transmitter; RCLK selects Timer 2 as the baud-rate generator for
the receiver. The 16-bit reload value for Timer 2 is stored in the RCAP2L and RCA2H
SFRs, which makes the equation for the Timer 2 baud rate:
where RCAP2H,RCAP2L is the content of RCAP2H and RCAP2L taken as a 16-bit
unsigned number. The 32 in the denominator is the result of the CPU_clk signal being
divided by 2 and the Timer 2 overflow being divided by 16. Setting TCLK or RCLK to
1 automatically causes the CPU_clk signal to be divided by 2, as shown in Figure 23
Timer 2 – Baud Rate Generator Mode, instead of the 4 or 12 determined by the T2M bit
in the CKCON SFR.
To derive the required RCAP2H and RCAP2L values from a known baud rate, use the
equation:
Table
desired baud rates.
When either RCLK or TCLK is set, the TF2 flag will not be set on a Timer 2
rollover, and the t2ex
*
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone [phone] - Fax [phone]
Revision: 1.3
See chapter 16.2 for t2ex definition.
Desired
19.2 Kb/s
9.6 Kb/s
4.8 Kb/s
0.4 Kb/s
1.2 Kb/s
Baud Rate
Table 73
Table 72 Timer 1 Reload Values for Serial Port Mode 1 Baud Rates.
Table 73 Timer 2 Reload Values for Serial Port Mode 1 Baud Rates.
lists sample values of RCAP2L and RCAP2H for a variety of
Baud Rate
57.6 Kb/s
19.2 Kb/s
Baud Rate =
9.6 Kb/s
4.8 Kb/s
0.4 Kb/s
1.2 Kb/s
RCAP2H,RCAP2L = 65536 –
SMOD
1
1
1
1
1
*
reload trigger is disabled.
32
C/T
0
0
0
0
0
x
C/T
2
0
0
0
0
0
0
(65536
Page 87 of 108
Timer 1
16 MHz CPU clk
RCAP2H
0xFF
0xFF
0xFF
0xFF
0xFF
0xFE
Mode
-
{RCAP2H,
2
2
2
2
2
clk
32
TH1
for 16 MHz
CPU clk
x
Baud
RCAP2L
0xF7
0xE6
0xCC
0x98
0x30
0x5F
RCAP2L})
clk
0xF3
0xE6
0XcC
0x98
0x30
Value
Rate
TH1
for
CPU clk
-
0xF3
0xE6
0xCC
0x98
8 MHz
Value
June 2006