Specifications

SIM7912&SIM7906 Hardware Design V1.02
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Table 6: Pin description
Power supply
Pin name
Pin
No.
Electrical description
Description
Comment
VBAT_BB
155,
156
PI
V
MAX
=4.3V
V
TYP
=3.8V
V
MIN
=3.3V
Input power supply for
module’s BB part
It must be provided with
sufficient current up to
1.0A.
VBAT_RF
85,8
6,
87,
88
PI
V
MAX
=4.3V
V
TYP
=3.8V
V
MIN
=3.3V
Input power supply for
module’s RF part
It must be provided with
sufficient current up to
1.5A in a transmitting
burst.
VDD_P2
135
PI
VDD_P2
=SD_VDD
or
VDD_P2
=VDD_EXT
SD card power supply
If an SD card is used,
connect VDD_P2 to
SD_VDD. If an eMMC* is
used or SDIO interface is
unused, connect VDD_P2
to VDD_EXT.
VDD_EXT
168
PO
V
TYP
=1.8V
Provide 1.8V for external
circuit.
Iomax=50mA
VDD_RF
162
PO
V
TYP
=2.85V
Provide 2.85V for
external RF circuit.
Iomax=120mA
GND
10, 13, 16, 17, 24, 30, 31, 35, 39, 44, 45, 54, 55, 63, 64, 69,
70, 75, 76, 81, 82, 83, 84, 89, 90, 92, 93, 94, 96, 97, 98, 99,
100, 102, 103, 104, 105, 106, 108, 109, 110, 111, 112, 114,
115, 116, 117, 118, 120, 121, 122, 123, 124, 125, 126, 128,
129, 130, 131, 132, 133, 141, 142, 148, 153, 154, 157, 158,
167, 174, 177, 178, 181, 184, 187, 191, 196, 202~208,
214~299
Ground
Turn on/off
V
IH
High level input
1.3V
2.1V
V
IL
Low level input
0.3V
-
0.5V
P4/P5
VDD_P4/P5=1.8V
V
OH
High level output
1.45V
-
1.8V
V
OL
Low level output
0V
-
0.4V
V
IH
High level input
1.26V
-
2.1V
V
IL
Low level input
0V
-
0.36V
VDD_P4/P5=3.0V
V
OH
High level output
2.4V
-
3V
V
OL
Low level output
0V
-
0.4V
V
IH
High level input
2.1V
-
3.05V
V
IL
Low level input
0V
-
0.57V