4021-DKDB14 Silicon Laboratories Inc, 4021-DKDB14 Datasheet - Page 21

• Manufacturer Part Number: 4021-DKDB14
• Description: KIT DEV TEST EZRADIO SI4021 TX
• Manufacturer: Silicon Laboratories Inc

Specifications of 4021-DKDB14

• Accessory Type: Test Card, Transmitter, 434MHz
• Wireless Frequency: 434 MHz
• Interface Type: SPI
• Modulation: FSK, OOK
• For Use With/related Products: EZRadio®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

11. Status Register Read Command
With this command, it is possible to read the chip’s status register through the nIRQ pin. This command clears the last serviced interrupt and
processing the next pending one will start (if there is any).
12. PLL Setting and Reset Mode Command
Bits 7-6 <bw1 : bw0> select the PLL bandwidth:
Bit 1 (dr): Disables the highly sensitive RESET mode. If this bit is cleared, a 600 mV glitch in the power supply may cause a system reset. For
more detailed description see the Reset modes section.
bit
bit
bw1 bw0
Status Register Read Sequence
0
1
0
1
15
15
1
1
nSEL
nIRQ
SCK
SDI
1
1
0
0
14
14
1
1
Max datarate
0
13
13
0
0
[kbps]
115.2
19.2
38.4
68.9
1
12
12
0
1
2
11
11
1
0
Phase Noise at 1MHz offset
instruction
3
10
10
1
0
[dBc/Hz] (typical)
4
9
9
0
1
-112
-110
-107
-102
5
8
0
8
0
6
bw1
7
0
7
7
bw0
6
0
6
Charge pump current
POR
8
5
0
5
0
PB1
100%
25%
33%
50%
9
4
0
4
0
PB2
10
3
0
3
0
PB3
11
status out
2
0
2
0
PB4
12
dr
1
0
1
LBD
13
0
0
0
0
WK-UP
14
nIRQ
15
D200h
POR
POR
- -
Si4021
21