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CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 49 -
3.14 SPI interface / multiplexed I2S interface
The CLM920 NC3 provides an SPI interface with a maximum clock rate of 50MHz. In
addition, the module can only be used as the master, and the interface voltage domain is 1.8V.
Table 3-20 SPI Pin Definitions
Pin
Signal
name
I/O
Descriptio
n
Param
eter
Level value (V)
Remarks
Min
Typical
Max
37
SPI_C
S_N
DO
SPI chip
selection
VOH
1.35
1.8
2
Multiplexin
g I2S_D1
VOL
0
0.45
38
SPI_
MOSI
DO
SPI data
output
VOH
1.35
1.8
2
Reuse
I2S_WS
VOL
0
0.45
39
SPI_
MISO
DI
SPIO data
input
VIH
1.2
1.8
2
Multiplexin
g I2S_D0
VIL
-0.3
0.6
40
SPI_C
LK
DO
SPI clock
VOH
1.35
1.8
2
Multiplexin
g I2S_CLK
VOL
0
0.45
The SPI interface of the CLM920 NC3 module can also be used as I2S. It can be
connected to the CODEC. The existing I2S supports the Nuvoton NAU8810 by default.
Table 3-21 I2S pin definition
Pin
Signal name I/O Description
Parame
ter
Level value (V)
Rem
arks
Min
Typical Max
37
I2S_D1
IO
I2S serial
data
VOH
1.35
1.8
2
VOL
0
0.45
VIH
1.2
1.8
2
VIL
-0.3
0.6
38
I2S_WS
IO
I2S
command
selection
VOH
1.35
1.8
2
VOL
0
0.45
VIH
1.2
1.8
2
VIL
-0.3
0.6
39
I2S_D0
IO
I2S serial
VOH
1.35
1.8
2