RFM22 Datasheet, PDF (9/150 Pages) –

RFM22
Table 6. Digital IO Specifications (SDO, SDI, SCLK, nSEL, and nIRQ)
Parameter
Rise Time
Fall Time
Input Capacitance
Symbol
TRISE
TFALL
CIN
Conditions
0.1 x VDD to 0.9 x VDD, CL= 5 pF
0.9 x VDD to 0.1 x VDD, CL= 5 pF
Logic High Level Input Voltage
VIH
Logic Low Level Input Voltage
Input Current
Logic High Level Output Voltage
Logic Low Level Output Voltage
VIL
IIN
VOH
VOL
0<VIN< VDD
IOH<1 mA source, VDD=1.8 V
IOL<1 mA sink, VDD=1.8 V
Note: All specification guaranteed by production test unless otherwise noted.
Min
Typ
—
8
—
8
—
1
VDD – 0.6 —
—
–100
—
VDD – 0.6 —
—
—
Max Units
—
ns
—
ns
—
pF
—
V
0.6 V
100 nA
—
V
0.6 V
Table 7. GPIO Specifications (GPIO_0, GPIO_1, and GPIO_2)
Parameter
Symbol
Conditions
Min
Typ Max Units
Rise Time
TRISE
0.1 x VDD to 0.9 x VDD,
CL= 10 pF, DRV<1:0>=HH
—
8
—
ns
Fall Time
Input Capacitance
TFALL
0.9 x VDD to 0.1 x VDD,
—
CL= 10 pF, DRV<1:0>=HH
CIN
—
8
—
ns
1
—
pF
Logic High Level Input Voltage
VIH
VDD – 0.6
—
V
Logic Low Level Input Voltage
VIL
—
— 0.6 V
Input Current
IIN
0<VIN< VDD
–100
— 100 nA
Input Current If Pullup is Activated
IINP
VIL=0 V
5
—
25 μA
Maximum Output Current
IOmaxLL
DRV<1:0>=LL
0.1
0.5 0.8 mA
IOmaxLH
DRV<1:0>=LH
0.9
2.3 3.5 mA
IOmaxHL
DRV<1:0>=HL
1.5
3.1 4.8 mA
IOmaxHH
DRV<1:0>=HH
1.8
3.6 5.4 mA
Logic High Level Output Voltage
VOH
IOH< IOmax source,
VDD=1.8 V
VDD – 0.6
—
—
V
Logic Low Level Output Voltage
VOL
IOL< IOmax sink, VDD=1.8 V
—
— 0.6 V
Note: All specification guaranteed by production test unless otherwise noted.
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