SimCom SIM800L User Manual

Smart Machine Smart Decision
SIM800L(MT6261)_Hardware Design_V1.01 16 2016-07-07
capacitor (e.g. 4.7uF).
VDD_EXT 18 O 2.8V power output
If these pins are unused,
keep open.
GND
2,6,8,35,37,38,39,
41,43,44,45,58,67
,71,72,73,76,77,7
8,79,80,81,82,83,
84,85,86,87,88
Ground
GND for VBAT recommend
to use 2,43,44,45pin
Power on/down
PWRKEY 48 I
PWRKEY should be pulled low at
least 1 second and then released to
power on/down the module.
Internally pulled up to
V B AT.
Audio interfaces
MIC1P 52
I Differential audio input
If these pins are unused,
keep open.
MIC1N 12
SPK1P 53
O Differential audio output
SPK1N 13
MIC2P 9
I Differential audio input
MIC2N 10
SPK2P 51
O Differential audio output
SPK2N 11
PCM interface
PCM_CLK
29
O
PCM interface for digital audio
If these
pins are unused,
keep open.
PCM_OUT 30 O
PCM_SYNC
65
O
PCM_IN 66 I
Keypads interface
KBC4 24 I
Support up to 50 buttons (5*5*2)
If these pins are unused,
keep open.（Please make
sure pin20 at high level
when power on）
KBC3 21 I
KBC2
22
I
KBC1 25 I
KBC0 20 I
KBR4 63 O
KBR3 23 O
KBR2 61 O
KBR1
60
O
KBR0
62
O
GPIO
GPIO1
3
I/O
Programmable general purpose input
and output
GPIO2 27 I/O
GPIO3 28 I/O
SIMCOM CONFIDENTIAL FILE

SimCom SIM800L Specifications

General

Brand	SimCom
Model	SIM800L
Category	Recording Equipment
Language	English