Data Sheet

Mode selection
KATP will enter either AT-CMD or Transparent mode by the status of MODE_SEL pin
(P34) at 10 sec after reset or power up. If the pin is HIGH, PRBMD00 will enter AT-CMD
mode, otherwise will enter Transparent mode.
In the 10-sec window, KATP will be at AT-CMD mode first, if command “AT+HIGH” is
issue within this window, KATP will then stay at AT-CMD mode after the window
period. It provide an alternative way to enter different mode.
In the AT-CMD mode, user is allowed to change settings of PRBMD00, such as UART
speed, Bluetooth name…etc. The table below lists all the available AT-CMD.
In AT-CMD mode, data can also tunnel between UART and Bluetooth. Any data from
Bluetooth side will pass to UART port; Any data not started with “AT+” will be deemed
as data and will pass to Bluetooth side.
Default setting
The default setting of KATP are: BUAD=115200; NAME= PRBMD00. User is able to
change them in AT-CMD mode. There are two ways to change these setting to default
value: 1. AT+DEFAULT command in AT-CMD mode; 2. Pull P03 to ground level while
reset or power will also make KATP revert to default setting.
Sleep mode
KATP will put PRBMD00 into sleep mode automatically after a while of idle.
LED indication
KATP uses pin P34 as LED indication (sink), which indicates the connection status. It
will flash at the rate of 20ms per second while advertising, and will turn on after
connection is built.
PRBMD00 DATASHEET 1.5
K-SOLUTION
16
Reset
10 sec. after reset
AT-command mode
MODE_SEL status detected
Transparent mode
MODE_SEL pin
Mode selection by MODE_SEL pin
Reset
10 sec. after reset
AT-command mode
Transparent mode
if AT+HIGH cmd
AT-command mode
if no AT+HIGH cmd
Mode selection by AT+HIGH command