Data Sheet

THUNDERCOMM TurboX™ C40x SoM Datasheet
30
These GPIOs are available as BAM-based low-speed peripheral (BLSP) interface ports that can be configured
for UART, SPI, or I2C operation.
I2C is a two-wire bus that can be routed to multiple devices; each line of each bus is supplemented by a
2.2kΩ pull-up resistor.
2-wire UART Tx/Rx and I2C SDA/SCL ports can be used simultaneously.
BLSP Interface-1
BLSP Number
GPIO
PIN
Location
Voltage
Type
Description
Notes
SPI
UART
I2C
0
30
64
P3
IO
MOSI
TX
-
31
65
P3
IO
MISO
RX
-
32
66
P3
IO
CS_N
CTS_N
SDA
33
67
P3
IO
CLK
RFR_N
SCL
1
22
C23
P3
IO
MOSI_A
TX
-
23
D23
P3
IO
MISO_A
RX
-
24
C24
P3
IO
CS_N_A
CTS_N
SDA
25
D24
P3
IO
CLK_A
RFR_N
SCL
2
17
C26
P3
IO
MOSI
TX
-
18
D26
P3
IO
MISO
RX
-
19
C27
P3
IO
CS_N
CTS_N
SDA
20
D27
P3
IO
CLK
RFR_N
SCL
4
37
69
P3
IO
MOSI
TX
-
38
70
P3
IO
MISO
RX
-
117
D28
P3
IO
CS_N
CTS_N
SDA
118
C29
P3
IO
CLK
RFR_N
SCL
Table 3-3-12-1 BLSP interface definition
BLSP Interface-2
BLSP Number
GPIO
PIN
Location
Voltage
Type
Description
Notes
SPI
UART
I2C
5
26
22
P3
IO
MOSI
TX
-
27
23
P3
IO
MISO
RX
-
28
24
P3
IO
CS_N
CTS_N
SDA
29
25
P3
IO
CLK
RFR_N
SCL
44
113
P3
IO
CS1_N
-
-
45
114
P3
IO
CS2_N
-
-
46
115
P3
IO
CS3_N
-
-
Table 3-12 BLSP interface definition
3.3.12 Power On Interface