C8051F120-TB Silicon Laboratories Inc, C8051F120-TB Datasheet - Page 282
C8051F120-TB
Manufacturer Part Number
C8051F120-TB
Description
BOARD PROTOTYPING W/C8051F120
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F120-TB
Contents
Board
Processor To Be Evaluated
C8051F12x and C8051F13x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F120
Silicon Family Name
C8051F12x
Kit Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F120
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F120-TB
Manufacturer:
Silicon Labs
Quantity:
135
- Current page: 282 of 350
- Download datasheet (2Mb)
C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
282
Bits 7–0: SPI0DAT: SPI0 Transmit and Receive Data.
Bits 7–0: SCR7–SCR0: SPI0 Clock Rate.
Example: If SYSCLK = 2 MHz and SPI0CKR = 0x04,
f
SCK
SCR7
f
R/W
Bit7
SCK
R/W
Bit7
=
=
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.
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 version 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
200kHz
------------------------- -
2
2000000
SCR6
R/W
Bit6
R/W
Bit6
4
+
SFR Definition 20.3. SPI0CKR: SPI0 Clock Rate
1
SFR Definition 20.4. SPI0DAT: SPI0 Data
SCR5
R/W
Bit5
R/W
Bit5
f
SCK
SCR4
R/W
Bit4
R/W
Bit4
=
---------------------------------------------- -
2
Rev. 1.4
SCR3
R/W
Bit3
R/W
Bit3
SPI0CKR
SYSCLK
SCR2
R/W
Bit2
R/W
Bit2
+
1
SCR1
R/W
Bit1
R/W
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
SCR0
R/W
Bit0
R/W
Bit0
0x9B
0
00000000
0x9D
0
Reset Value
00000000
Reset Value
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