CP2120-GM Silicon Laboratories Inc, CP2120-GM Datasheet - Page 9
CP2120-GM
Manufacturer Part Number
CP2120-GM
Description
IC I/O EXPANDER I2C/SPI 8B 20QFN
Manufacturer
Silicon Laboratories Inc
Type
SPI to I2C Bridger
Specifications of CP2120-GM
Package / Case
20-QFN
Interface
I²C, SPI
Number Of I /o
8
Interrupt Output
Yes
Frequency - Clock
400kHz
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
336-1324
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CP2120-GM
Manufacturer:
AMS
Quantity:
195
Company:
Part Number:
CP2120-GMR
Manufacturer:
PANASONIC
Quantity:
12 500
5. SPI Slave Bus
The CP2120 provides a four-wire slave SPI interface. The CP2120's SPI Bus activates whenever the SPI Master
pulls the NSS pin low. The master can then clock data into the CP2120 through the Master-Out-Slave-In (MOSI)
pin and receive data from the CP2120 through the Master-In-Slave-Out (MISO) pin. The SPI Master provides the
SPI with a clock source. Figure 2 shows typical connections for an SPI bus.
SCLK should be held high when idle. Figure 3 shows a CP2120 data transfer on the SPI Bus. If the CP2120 is the
only slave device on the SPI bus, the NSS pin can be tied low.
MOSI
MISO
SCK
NSS
MSB
MSB
SPI Master
Bit 6
Bit 6
SPICLK
Figure 3. Slave Mode Data/Clock Timing
Figure 2. SPI Bus Typical Connections
CS
Bit 5
Bit 5
MISO
MOSI
SCLK
CS
Rev. 0.4
Bit 4
Bit 4
Bit 3
Bit 3
Bit 2
Bit 2
CP2120
Bit 1
Bit 1
CP2120
Bit 0
Bit 0
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