RFM31B-868-D QUASAR, RFM31B-868-D Datasheet - Page 36

• Manufacturer Part Number: RFM31B-868-D
• Description: MODULE, RECEIVER, -118DB, 868MHZ
• Manufacturer: QUASAR

Specifications of RFM31B-868-D

• Modulation Type: FSK, GFSK, OOK
• Sensitivity: -121dBm
• Power Supply: 1.8V To 3.6V
• Supply Current: 18.5mA
• Data Rate Max: 256Kbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RFM31B
8. Auxiliary Functions
8.1. Smart Reset
The RFM31B contains an enhanced integrated SMART RESET or POR circuit. The POR circuit contains both a
classic level threshold reset as well as a slope detector POR. This reset circuit was designed to produce a reliable
reset signal under any circumstances. Reset will be initiated if any of the following conditions occur:




The reset will initialize all registers to their default values. The reset signal is also available for output and use by
the microcontroller by using the default setting for GPIO_0. The inverted reset signal is available by default on
GPIO_1.
36
Initial power on, VDD starts from gnd: reset is active till VDD reaches V
When VDD decreases below V
A software reset via “Register 08h. Operating Mode and Function Control 2,” : reset is active for time
T
On the rising edge of a VDD glitch when the supply voltage exceeds the following time functioned limit:
Release Reset Voltage
Power-On VDD Slope
Low VDD Limit
Software Reset Pulse
Threshold Voltage
Reference Slope
VDD Glitch Reset Pulse
SWRST
Tel: [phone]
Parameter
VDD starts to rise
0.4V
Fax: [phone]
LD
TSWRST
Figure 18. POR Glitch Parameters
for any reason: reset is active till VDD reaches V
Symbol
SVDD
VTSD
VRR
VDD(t)
VLD
TP
k
Table 14. POR Parameters
t=0,
VDD nom.
Also occurs after SDN, and
VLD<VRR is guaranteed
tested VDD slope region
initial power on
reset:
Vglitch>=0.4+t*0.2V/ms
Comment
E-mail: [e-mail] http://www.hoperf.com
showing glitch
actual VDD(t)
Reset
0.4V+t*0.2V/ms
T
P
reset limit:
RR
(see table);
t
0.85
0.03
Min
0.7
50
5
RR
;
Typ
1.3
0.4
0.2
16
1
Max
1.75
300
470
1.3
40
V/ms
V/ms
Unit
ms
us
V
V
V