SI4021-A1-FT Silicon Laboratories Inc, SI4021-A1-FT Datasheet - Page 17

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SI4021-A1-FT

Manufacturer Part Number
SI4021-A1-FT
Description
IC TX FSK 915MHZ 5.4V 16-TSSOP
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of SI4021-A1-FT

Package / Case
16-TSSOP
Frequency
433MHz, 868MHz, 915MHz
Modulation Or Protocol
FSK, OOK
Data Rate - Maximum
512kbps
Power - Output
8dBm
Current - Transmitting
24mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
2.2 V ~ 5.4 V
Operating Temperature
-40°C ~ 85°C
Operating Frequency
433 MHz to 915 MHz
Mounting Style
SMD/SMT
Operating Supply Voltage
2.2 V to 5.4 V
Supply Current
1.5 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Applications
-
Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1622-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SI4021-A1-FTR
Manufacturer:
SILICON
Quantity:
5 000
8. Push-Button Command
If the corresponding bit was set (b1-b4) the event remains active while the button is pressed. In EEPROM mode, the chip is continuously
performing the routine assigned to the push-button while it is pressed. In microcontroller mode, the chip continuously generates interrupts
on nIRQ until the push-button is released. Weak pull-up currents are switched off when bc is high.
The d0, d1 bits set the de-bouncing time period:
Note:
bit
d1
0
0
1
1
15
1
Until the de-bouncing time has expired, the crystal oscillator remains switched on, independent of the status of the ex bit in the
Power Management Command. (Because the circuit uses the crystal oscillator signal for timing.)
If the p4 bit is set, the controller performs the routine assigned to the fourth button when PB1 and PB2 are pressed down
simultaneously. With the addition of this feature, there is a way to build a device that uses 3 buttons, but performs 4 functions.
It is possible to detect multiple pressed push-buttons, in both modes. In EEPROM mode the controller executes sequentially all the
routines belonging to the pressed buttons.
d0
0
1
0
1
14
1
De-bouncing Time [ms]
160
40
10
0 (Bypassed)
13
0
12
0
11
1
10
0
9
1
8
0
p4
7
d1
6
d0
5
b4
4
b3
3
b2
2
b1
1
bc
0
CA00h
POR
Si4021
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