BT730

Datasheet

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2.3

Electrical Specifications

2.3.1 Absolute Maximum ratings

Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the module are listed

below; exceeding these values will cause permanent damage.

Table 2-2: Absolute Maximum Ratings

Parameter

Min

Max

Unit

Peak current of power supply

0

200

mA

Voltage at digital pins

-0.4

3.7

V

Voltage at POWER pin

2.9

6.0

V

2.3.2 Recommended Operating Parameters

Table 2-3: Power Supply

Signal Name

Pin No

I/O

Voltage level

Comments

VCC_IN

11

I

3.3 V to 5.0 V *

Typ 3.5 V

GND

1, 12, 15, 20

Four (4) ground terminals to be attached in

parallel.

VCC_3V3_monitor

13

O

3.3 V typical

For monitoring only. No current source.

Note:

VCC_3V3_monitor refers to internal voltage generated by the LDO inside the module which is typically

3.3 V. So to achieve 3.3 V for VCC_3V3_monitor (at Max Tx Power) requires VCC_IN of 3.5 V. IO

voltage levels follows VCC_3V3_monitor. At minimum VCC_VIN of 3.3 V, the internal LDO generates

3.3 V but when Radio Tx at max Tx power, VCC_3V3_monitor drops a little (to ~3.15 V).

Table 2-4: Signal Levels for Interface, PCM, SPI, and GPIO

Signal Type

Signal level

Signal level @ 0 mA load

Input

VILmin= -0.4 V

VILmax=0.8 V

VIHmin=2.3 V

VIHmax=3.7 V

Output

VOLmax=0.2 V

VOHmin=3.1 V

Table 2-5: UART Interface

Signal Name

Pin No

I/O

Comments

UART_TX

23

O

UART_RX

22

I

UART_CTS

25

I

UART_RTS

24

O

UART_DSR

16

I

UART_DTR

29

O

Shared with GPIO3

UART_RI

28

I or O

Direction may be programmed.

UART_DCD

17

I or O

Direction may be programmed.