CP2400DK Silicon Laboratories Inc, CP2400DK Datasheet - Page 102

• Manufacturer Part Number: CP2400DK
• Description: KIT EVAL SPI LCD DRIVER CP2400
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2400DK

• Main Purpose: LCD Development
• Embedded: Yes
• Utilized Ic / Part: CP2400
• Primary Attributes: I²C, SMBus Interfaces
• Secondary Attributes: Up to 128 segments
• Product: Microcontroller Modules
• Core Processor: C8051F930
• Clock Speed: 20 MHz
• Interface Type: SPI
• Timers: 2
• Operating Supply Voltage: 1.8 V to 3.6 V
• Cpu Core: C8051F930
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 336-1858; 336-1858

CP2400/1/2/3
14.2. Serial Clock Timing
The clock to data relationship is shown in Figure 14.2. If the SPI master is a C8051 microcontroller, its SPI
peripheral must be configured for Mode 0 communication (CKPOL = 0, CKPHA = 0).
The maximum data transfer rate (bits/sec) for full-duplex operation is 1/10 the system clock frequency, provided
that the master issues SCK, NSS, and the serial input data synchronously with the system clock. If the master
issues SCK, NSS, and the serial input data asynchronously, the maximum data transfer rate (bits/sec) must be less
than 1/10 the system clock frequency. In the special case where the master only wants to transmit data to the
device and does not need to receive data back (i.e. half-duplex operation), the slave can receive data at a
maximum data transfer rate (bits/sec) of 1/4 the system clock frequency. This is provided that the master issues
SCK, NSS, and the serial input data synchronously with the system clock.
102
SCK
(CKPOL=0, CKPHA=0)
MOSI
MISO
NSS (4-Wire Mode)
MSB
MSB
Bit 6
Bit 6
Figure 14.2. Data/Clock Timing
Bit 5
Bit 5
Rev. 1.0
Bit 4
Bit 4
Bit 3
Bit 3
Bit 2
Bit 2
Bit 1
Bit 1
Bit 0
Bit 0