User Guide

LM960 HW Design Guide
1VV0301485 Rev. 3 Page 36 of 74 2018-12-14
Parameter Min Max Unit Comment
IIL Low-level input leakage
current
-- 1000 [uA] No pull-up
IIH High-level input leakage
current
-20 20 [uA] No pull-down
Power On
The LM960 is automatically turning on when the VBATT is supplied.
Information – To turn on the LM960 module, the SYSTEM_RESET_N
pin must not be asserted low.
6.2.1. Initialization and Activation State
After turning on the LM960 module, the LM960 is not yet activated because the SW
initialization process of the LM960 module is still in process internally. It takes some time
to fully complete the HW and SW initialization of the module.
For this reason, it is impossible to access LM960 during the Initialization state.
As shown in below figure, the LM960 becomes operational (in the Activation state) at least
30 seconds after the VBATT is supplied.
LM960 Initialization and Activation
Information – To check if the LM960 has completely powered on,
LM960 and the host must be connected via USB. When USB driver
completely loaded, the module has completely powered on and is
ready to accept AT commands.
Information – Active low signals are labeled with a name that ends with
“_N”