Rainbow-electronics DAB-WLS-C21 (BlueTooth) Manual de usuario descargar pdf (Pagina 6)

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Pin 6 (UART_RI) is active low. It is normally 3.3v. When a remote device initiates a connection, this

pin goes low. This means that when this pin is converted to RS232 voltage levels it will have the

correct voltage level for assertion.

Pin 8 (UART_DCD) is active low. It is normally 3.3v. When a connection is live this pin is low. This

means that when this pin is converted to RS232 voltage levels it will have the correct voltage level for

assertion.

Pin 10 (UART_DSR) is an input, with active low logic. It should be connected to the DTR output of the

host. When the BISM II PA Module is in high speed mode (See definition for S Register 507), this pin

should be asserted by the host to ensure that the connection is maintained. A deassertion is taken to

mean that the connection should be dropped, or an online command mode is being requested.

Pin 27 (VCC_3V3 monitor) may only be used for monitoring purposes. It must not be used as a

current source.

The GPIO pins can be accessed using S Registers 621 to 628.

GPIO3 is also used for DTR output (active low). See S Register 552 & 553.

Analogue 0 and 1 should not exceed 1.8v and S Registers 701 and 702 are used to access them.

3.3 Electrical Specifications

3.3.1 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.

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 3.5 * 8.0 V

3.3.2 Recommended Operating Parameters

3.3.2.1 Power Supply

Signal Name Pin No I/O Voltage level Comments

Vcc 29 I 3.6V to 5.0V * I

typ

= 130mA

GND 11, 15, 18,

30, 36, 38

6 Ground terminals to be attached

in parallel

VCC_3V3 27 O 3.3V typical For monitoring only. No current

source

3.3.2.2 Signal Levels for Interface, PCM, SPI and GPIO

Signal Type Signal level Signal level @ 0mA load

Input V

min= -0.4V

max=0.8V

min=2.3V

max=3.7V

Output V

max=0.2V

min=3.1V

(* for 3.3V operation use the BTM404 module)

1 2 3 4 5 6 7 8 9 10 11 ... 31 32

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Rainbow-electronics DAB-WLS-C21 (BlueTooth) Manual de usuario Pagina 6

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