C8051F320-TB Silicon Laboratories Inc, C8051F320-TB Datasheet - Page 205
C8051F320-TB
Manufacturer Part Number
C8051F320-TB
Description
BOARD PROTOTYPING W/C8051F320
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F320-TB
Contents
Board
Processor To Be Evaluated
C8051F320/F321
Interface Type
USB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F320
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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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
R/W
SCK
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
f
SCK
------------------------- -
2
2000000
SCR6
R/W
Bit6
R/W
Bit6
=
4
SFR Definition 18.4. SPI0DAT: SPI0 Data Register
+
------------------------------------------------ -
2
SFR Definition 18.3. SPI0CKR: SPI0 Clock Rate
1
SCR5
SPI0CKR
SYSCLK
R/W
Bit5
R/W
Bit5
SCR4
R/W
+
Bit4
R/W
Bit4
1
Rev. 1.4
SCR3
R/W
R/W
Bit3
Bit3
SCR2
R/W
R/W
Bit2
Bit2
SCR1
R/W
Bit1
R/W
Bit1
C8051F320/1
SFR Address: 0xA2
SCR0
R/W
R/W
Address:
Bit0
Bit0
SFR
0xA3
00000000
00000000
Reset Value
Reset Value
205
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