Multi-Functional Interface; Sink Current Source - SimCom SIM5320AL User Manual

T(pdout) Delay from PCM_CLK rising to PCM_DOUT valid
Delay from PCM_CLK falling to PCM_DOUT
T(zdout)
HIGH-Z
Note: SIM5320 can transmit PCM data by USB except for PCM interface. Please refer to document [22] for more
information of PCM Application Note.

3.12 Multi-functional interface

SIM5320AL merges functions for various applications. It can enrich users' design and lower the cost of
users' hardware.

3.12.1 Sink Current Source

The dedicated pin (CURRENT_SINK) is intended for driving passive devices， such as LCD backlight, this
implementation is +5V tolerant and suitable for driving white LEDs. The high-current driver can maintain
a constant current which is set by the AT command "AT+ CLEDITST", capable of up to 150 mA.
Table 31: Electronic characteristic
Symbol Description
CURRENT_SINK Input voltage
I Input current
O
Since the driver is ground-referenced current sink, the operating device it drives must form a current path
between the VDD pin and the CURRENT_SINK pin. The following figure is for users reference.
SIM5320AL_User Manual_V1.01
Min Typ
0.5 VDD
- -
Figure 36: Current drive
48
Smart Machine Smart Decision
– – 350
– 160 –
Max Unit
5 V
150 mA
2014-08-20
ns
ns