User's Manual

BT900-Sx Hardware Integration Guide
Intelligent BTv4.0 Dual Mode Module
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13 CONN-HIG-BT900
BT_VREG_OUT_HV
1.7
2.0
V
BT_VDD_IO
-
0.4
3.6
V
Voltage at GND pin
0
V
Voltage at SIO pin
-
0.3
VCC+0.3
V
Storage temperature
-
40
+85
ºC
3.3.2 Recommended Operating Parameters
Table 4: Power Supply Operating Parameters
Parameter Min Typ Max Unit
VCC
1
(Note1)
1.
75
3
.3
3.6
V
AVCC
1
(AVCC=VCC)
Note
1
1.7
5
3.3
3.6
V
AVREF
1
(when AVCC>=2.7V
AVREF
1
(when AVCC<2.7V)
2.7V
AVCC
AVCC
AVCC
V
VCC Maximum ripple or noise
2
<
10
%of VCC
%
VCC rise time (0 to 1.8V
)
2
VCC shut down time (1.8V to 0V)
2
0.1
1
mS
mS
Operating Temperature Range
-40 - +85 ºC
BT_VREG_IN_HV
4
2.3
3.6
V
BT_VREG_OUT_HV
4
1.75
1.95
V
BT_VDD_IO
1.2
3.6
V
Note 1: Notes on power on. Turn on/off in the following order or at same time.
Turning on: VCCAVCCAVRH. Turning off: AVRHAVCCVCC. If not using
the ADC convertor, connect AVCC=VCC.
Note 2: The maximum VCC ripple or noise (at any frequency) should not exceed 10% of VCC.
Ensure transient fluctuation rate does not exceed 0.1V/uS.
Note 3: nRESET input time is minimum 500nS. The on-board power-on reset circuitry may not
work for rise times outside the noted interval.
Time reset is active from VCC reaches 1.75 V with x mS rise time is v mS typical.
Time reset is active from VCC reaches 1.75 V with y uS rise time is z mS typical.
Note4: BT radio chip in the BT900 has two internal regulators, a high voltage (input pin
BT_VREG_IN_HV) and low voltage (input pin BT_VREG_OUT_HV) regulator. ONLY one
regulator can be used to power radio chip.
Method1: If BT900 is required to operate from 3.3V, connect external 3.3V supply to
pin31 BT_VREG_IN_HV and MUST leave pin32 BT_VREG_OUT_HV unconnected.
Pin5(VCC) and pin43(BT_VDD_IO) should be connected to pin31 BT_VREG_IN_HV.
Method2: If BT900 is required to operate from 1.8V, connect external 1.8V supply to
pin32 BT_VREG_OUT_HV and MUST leave pin31 BT_VREG_IN_HV unconnected.
Pin5(VCC) and pin43(BT_VDD_IO) should be connected to pin32 BT_VREG_OUT_HV.
Table 5: Signal Levels for Interface, SIO
Parameter Condition Min Typ Max Unit
VIH Input high voltage
VCC<2.7V
VCC>=2.7V
0.7VxCC
0.8VxCC
VCC+0.3
VCC+0.3
V