C8051F540-TB Silicon Laboratories Inc, C8051F540-TB Datasheet - Page 223
![BOARD PROTOTYPE W/C8051F540](/photos/9/25/92559/c8051f540-tb_sml.jpg)
C8051F540-TB
Manufacturer Part Number
C8051F540-TB
Description
BOARD PROTOTYPE W/C8051F540
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F540-TB
Contents
Board
Processor To Be Evaluated
C8051F54x
Processor Series
C8051F54x
Interface Type
USB
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F54x
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1672
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SFR Definition 22.3. SPI0CKR: SPI0 Clock Rate
SFR Address = 0xA2; SFR Page = 0x00
SFR Definition 22.4. SPI0DAT: SPI0 Data
SFR Address = 0xA3; SFR Page = 0x00
Name
Reset
Name
Reset
Bit
7:0
Bit
7:0
Type
Type
Bit
Bit
SPI0DAT[7:0] SPI0 Transmit and Receive Data.
SCR[7:0]
Name
Name
7
0
7
0
SPI0 Clock Rate.
These bits determine the frequency of the SCK output when the SPI0 module is
configured for master mode operation. The SCK clock frequency is a divided ver-
sion of the system clock, and is given in the following equation, where SYSCLK is
the system clock frequency and SPI0CKR is the 8-bit value held in the SPI0CKR
register.
for 0 <= SPI0CKR <= 255
Example: If SYSCLK = 2 MHz and SPI0CKR = 0x04,
The SPI0DAT register is used to transmit and receive SPI0 data. Writing data to
SPI0DAT places the data into the transmit buffer and initiates a transfer when in
Master Mode. A read of SPI0DAT returns the contents of the receive buffer.
f SCK
f SCK
6
0
6
0
=
=
----------------------------- -
2
--------------------------------------------------------------- -
2
2000000
x
x
5
0
5
0
4
SPI0CKR[7:0]
+
SYSCLK
1
Rev. 1.1
SPI0DAT[7:0]
4
0
4
0
SCR[7:0]
f SCK
+
R/W
R/W
1
Function
Function
=
3
0
3
0
200 kHz
2
0
2
0
C8051F54x
1
0
1
0
0
0
0
0
223
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