NRF9E5 NORDIC SEMICONDUCTOR, NRF9E5 Datasheet - Page 14
![TRX, 430-928MHZ, MCU/ADC/PWM, SMD](/photos/19/10/191023/134627007-40_sml.jpg)
NRF9E5
Manufacturer Part Number
NRF9E5
Description
TRX, 430-928MHZ, MCU/ADC/PWM, SMD
Manufacturer
NORDIC SEMICONDUCTOR
Datasheet
1.NRF9E5.pdf
(108 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NRF9E5C
Manufacturer:
NORDIC
Quantity:
5 000
Part Number:
NRF9E5C
Manufacturer:
NORDIC
Quantity:
20 000
PRODUCT SPECIFICATION
nRF9E5 Single Chip Transceiver with Embedded Microcontroller and ADC
5 SYSTEM CLOCK
The Microcontroller clock, CPU_CLK, is generated from the on chip crystal oscillator.
CPU_CLK frequency is configured in the RF-configuration register (see chapter 11) and
could be set to 0.5, 1, 2 or 4MHz. CPU_CLK could in addition be set equal to the crystal
oscillator frequency itself. The CPU_CLK generation is illustrated in Figure 3.
It is important to always set XOF equal to the actual crystal selected for the application.
The SFR 0xBF, CKLFCON, have to correspond with XOF, UP_CLK_FREQ and
XO_DIRECT. SFR 0xBF is described in Table 43 on page 53.
Default values of UP_CLK_FREQ and XO_DIRECT is '00' and '0' respectively. That is,
the default CPU_CLK frequency is 4MHz.
The chip has an internal low frequency clock that is always active. This clock ensure
proper operation of vital function when the chip is in power down mode and the crystal
oscillator is turned off, please see chapter 16 on page 53.
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone +4772898900 - Fax +4772898989
Revision: 1.3
XO
f
XO
Figure 3 CPU_CLK generation in nRF9E5.
Divide 1 to 5
XOF
4MHz
Page 14 of 108
Divide 1 to 4
UP_CLK
_FREQ
0.5 - 4MHz
XO_DIRECT
1
0
MUX
0.5 to 20MHz
f
CPU_CLK
June 2006