Specifications

SIM7028 Hardware Design V1.00
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SIM interface
SIM_DATA
15
I/O
SIM Card data I/O
SIM_RST
17
DO
SIM Reset
SIM_CLK
16
DO
SIM clock
SIM_VDD
18
PO
Power output for SIM card, its
output Voltage depends on
SIM card type automatically.
UART interface
UART1_TXD
1
DOH
Transmit Data
The voltage domain is
1.8V/3.3V optional.
Default 1.8 V.
UART1_RXD
2
DI，PU
Receive Data
UART1_RTS
3
DI，PU
Request to send
UART1_CTS
4
DOH
Clear to Send
UART1_DCD
5
DOH
Data carrier detect
UART1_DTR
6
DI，PU
Transmit Data
UART1_RI
7
DOH
Ring Indicator
UART0_TXD
22
DOH
Transmit Data
UART0_RXD
23
DI，PU
Receive Data
GPIO
NETLIGHT
41
DOH
LED control output as network
status indication.
VOLmax = 0.45 V
VOHmin = 0.7 x VDD_EXT
The voltage domain is
1.8V/3.3V optional.
Default 1.8 V.
STATUS
42
DO
Operating status output.
High level: Power on and
firmware ready
Low level: Power off
GPIO1
14
IO
GPIO2
29
IO
AON_GPIO
11
IO
Controllable level after
entering sleep
RF interface
ANT
32
AI
antenna
Other interface
ADC
38
AI
Analog-digital converter input.
Voltage range: 0-3.3V.
If unused, keep them
open.
RESERVED
9,24,25,26
Keep it open
BOOT is the download control pin, this pin cannot be pulled down before the normal boot. Otherwise, it
will enter the download mode.
NOTE