Bluegiga Technologies Oy

Page 9 of 31

2.1 I/O Ports

Each I/O port, except pins P1_0 and P1_1, can be configured as an input with either internal pull-up or pull-

down, or tri-state. Pull-down or pull-up can only be configured to whole port, not individual pins. Unused I/O

pins should have defined level and not be floating. To avoid excessive leakage current P1_0 and P1_1 must

be configured either as outputs or as inputs using external pull-up or pull-down resistors. See the Profile

Toolkit developer guide for more information about the configuration. During reset the I/O pins are configured

as inputs with pull-ups. P1_0 and P1_1 are inputs but do not have pull-up or pull-down.

The pins configured as peripheral I/O signals do not have pull-up/pull-down capability, even if the peripheral

function is an input. In power modes PM1, PM2, and PM3, the I/O pins retain the I/O mode and output value

(if applicable) that was set when PM1/PM2/PM3 was entered. All the IO’s set as input must have an external

pull-up or pull-down resistor to avoid excessive leakage current.

2.2 UART

UART baud rate can be configured up 2 Mbps. See the Profile Toolkit developer guide for more information.

Following table lists commonly used baud rates for BLE112

Baud rate (bps)

Error (%)

2400

0.14

4800

0.14

9600

0.14

14 400

0.03

19 200

0.14

28 800

0.03

38 400

0.14

57 600

0.03

76 800

0.14

115 200

0.03

230 400

0.03

Table 4: Commonly used baud rates for BLE112