AMB8426-M_8626-M_MA_EN_V2_4
Page 43 of 48
Released: Nov.2013
MSL 3
Attention!
These modules contain moisture sensitive components.
Care for further processing should be taken according to IPC/JEDEC J-STD-033.
Because there is no safety implemented in this module the used power source must comply
with clause 2.5 in EN 60950-1.
14 Factory-reset
After a Factory Reset the speed of the serial interface is set back to 9600 8n1
! Ensure to
have a suitable and stable power source.
14.1 Reset by command
By the command CMD_FACTORYRESET_REQ the user parameters may be reset to the
default settings. Functional communication via serial interface is a prerequisite.
14.2 Reset via pin-configuration
For this procedure of the power-up reset of the module the pins MOD_SEL0, MOD_SEL1,
MOD_SEL2 as well as MOD_SEL3 must be connected with VCC.
If the reset is successful the pin RX_IND toggles 3 times and the module is operational. In the
event of an error the pin TX_IND will toggle 3 times.
14.3 Reset by UART-Sequence
A factory reset may also be conducted via UART by means of a special sequence. Here the
baud rate of 9600 baud and the data format 8E1 (even parity) must be used.
1. During the power-up reset URXD must be pulled low by the host
(„Break-Signal“)
2. If the module recognises the break signal during power-up it returns the value 0x80
3. If now the code 0x93 is returned to the module within 50 ms, the user parameters are
reset.
4. The module acknowledges the reset process by a renewed transmission of code 0x80
5. By the code 0x9F the module may subsequently be restarted again.
