EM250-JMP-R Ember, EM250-JMP-R Datasheet - Page 107

• Manufacturer Part Number: EM250-JMP-R
• Description: KIT JUMP START FOR EM250
• Manufacturer: Ember
• Series: JumpStartr
• Type: 802.15.4/Zigbeer

Specifications of EM250-JMP-R

• Frequency: 2.4GHz
• For Use With/related Products: EM250
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 636-1001; EM250-JMP; EM250-JSK

7 Typical Application
Harmonic
C3
Filter
L2
C1
C2
Balun (BLN1)
Ceramic
1.8V
Figure 16 illustrates the typical application circuit for the EM250. This figure does not contain all decoupling
capacitance required by the EM250. The Balun provides the impedance transformation from the antenna to
the EM250 for both TX and RX modes. The harmonic filter provides additional suppression of the second har-
monic, which increases the margin over the FCC limit. The 24MHz crystal with loading capacitors is required
and provides the high frequency source for the EM250. The 32.768kHz crystal generates the clock source for
the Sleep Timer, but it is not mandatory as the internal RC Oscillator can be used. The RC debounce filter (R4
and C9) is suggested to improve the noise immunity of the RESET logic (Pin 13).
R1
L1
RF_TX_ALT_N
1.8V
RF_TX_ALT_P
VDD_24MHZ
VDD_PADSA
VDD_PADSA
R2
VDD_VCO
TX_ACTIVE
VDD_RF
VDD_IF
BIAS_R
RF_P
RF_N
C4
R3
10
11
12
1
2
3
4
5
6
7
8
9
X1
Optional
C6
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
GND
X2
49
Figure 16. Typical Application Circuit
C7
C5
EM250
C8
U1
36
35
34
33
32
31
30
29
28
27
26
25
(2.1V to 3.6V)
SIF_MOSI
SIF_MISO
SIF_CLK
GPIO10, RXD, MI, MSCL, TMR1IB.2
GPIO9, TXD, MO, MSDA, TMR1IA.2
GPIO8, VREF, TMR1CLK, TMR2ENMSK, IRQA
GPIO7, ADC3, REG_EN
GPIO6, ADC2, TMR2CLK,TMR1ENMSK
VDD_PADS
GPIO5, ADC1, PTI_DATA
GPIO4, ADC0, PTI_EN
GPIO3, nSSEL, TMR1IB.1
VDD_PADS
R4
C9
(2.1V to 3.6V)
VDD_PADS
120-0082-000I
Programming and
Debug Interface (these
pins should be routed
to test points)
EM250
107