User's Manual

L811-EA Module Hardware User Manual Page
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4.1.2 Description of Pins
The logic signal level of L811-EA module is 1.8V.
Pin#
Pin Name
I/O
Reset
Value
Idle
Value
Description
Power
N3
VBAT
PI
Power input
N4
VBAT
PI
Power input
M3
VBAT
PI
Power input
M4
VBAT
PI
Power input
N5
VRTC
PO
VRTC output
N6
VSD2_1V8
PO
VSD2_1V8 output
POWER_ON/OFF#,RESET
N7
RESET_N
I
Module reset input, pull up(100K ohms),1.8V
N8
POWER_ON/OFF#
I
Module power on/off signal, pull down (200K
ohms),1.8V
I2S
N9
I2S2_WA
O
PD
T
I2S LRCK,CMOS 1.8V
N10
I2S2_TX
O
PD
T
I2S data transmit, CMOS 1.8V
N11
I2S2_RX
I
PD
T
I2S data receive, CMOS 1.8V
N12
I2S2_CLK
O
PD
T
I2S serial clock, CMOS 1.8V
I2C
M11
I2C_SDA
IO
PU
PU
I2C serial data, pull up(4.7K ohms)CMOS
1.8V
M12
I2C_SCL
O
PU
PU
I2C serial clock, pull up(4.7K ohms)CMOS
1.8V
Clock
A3
FSYS2_26M
O
26MHz clock output,1.8V
A8
CLK32K
O
PD
PD
32kHz clock output,1.8V
SIM1
D15
VSIM1
PO
SIM1 power supply,1.8V/2.8V
E15
SIM1_RST
O
L
SIM1 reset
F15
SIM1_CLK
O
L
SIM1 clock