MYXPM6021 Datasheet, PDF (73/113 Pages) Micross Components – Tin-lead ball metallurgy

MYXPM6021*
*Advanced information. Subject to change without notice.
last known BATID line voltage value in order to ensure that no false battery removal events are reported.
12.2.4 BSI Sensing
MYXPM6021 is able to detect the presence of the R_BSI resistor as shown. The R_BSI is a 1% resistor and can range
anywhere from 0 to 130kΩ. MYXPM6021 is able to differentiate between different ID resistances (assuming standard 1%
values over the aforementioned range).
12.2.5 Digital Battery Communications
MYXPM6021 includes level shifting hardware that will take the single BATID line and convert it to two unidirectional 1.8V
I/O signals, BATIDIN and BATIDOUT. The SOC will communicate with the battery digital interface via MYXPM6021 which
is transparent and shifts the signals from the battery voltage domain to the 1.8V SOC domain. GPIO0P1 and GPIO0P2
pins are used for this function.
Software, based on the value of the BSI resistance discovered, may choose to enable digital battery communication.
Whenever digital communication is enabled (DBIEN bit in the BATDETCTRL register), MYXPM6021 disables the analog
BATID presence sensing logic, and will not falsely report removal events.
Table 45: Digital Battery Interface Specification
Parameter
Min
Nom
Voltage (VDD)
1.71
1.8
Vil
Vih
0.7*VDD
Vhys
0.1
Vol
Voh
VDD-0.45
Trise
20
Tfall
20
Tr/Tf
30
Max
1.89
0.3*VDD
0.2*VDD
300
300
70
Units
V
V
V
V
V
V
ns
ns
%
Notes
At pin
Measurement points
12.2.6 System Voltage Monitor
The System Voltage Monitor is used to indicate when the voltage level on the VSYS pin has settled above 3.0V. This is
implemented using a simple comparator and fixed thresholds. The voltage level on VSYS must stay above 3.0v for a
minimum of 100ms (i.e. debounce time) before the output will become active.
MYXPM6021*
Revision 1.1 - 10/21/14
73
Form #: CSI-D-685 Document 011