HBM1X1M

Bluetooth V1.2 Class 1 Module

Data Book

3

Terminal Descriptions

3.1 UART

Four signals are used to implement the UART function. UART_TXD and

UART_RXD transfer data between the two devices. The remaining two signals,

UART_CTS and UART_RTS, can be used to implement RS232 hardware flow

control where both are active low indicators.

3.1.1 UART Setting

User can change data format the following selection using PSKEY. However, host shall communicate with

default setting UART connection initiated at first time.

Baud Rate = (PSKEY_UART_BAUD_RATE) / 0.004096

Parameter

Possible value

Baud Rate

9600 ~ 1.5M Baud

Flow Control

RTS/CTS or None

Parity

None, Odd or Even

Number of Stop Bits

1 or 2

Bits per channel

8

3.1.2 UART Bypass Mode

Switch the bypass to PIO[7:4] as shown in figure. When the bypass mode has been invoked, module

enters the deep sleep state indefinitely.

RXD

CTS

RTS

TXD

Test Interface

UART

RESETB

UART_TX

UART_RTS

UART_CTS

UART_RS

CTS

RTS

TX

RX

PIO4

PIO5

PIO6

PIO7

Host Processor

BlueCore4-ROM CSP

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