C8051F314R Silicon Labs, C8051F314R Datasheet - Page 182

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C8051F314R

Manufacturer Part Number
C8051F314R
Description
8-bit Microcontrollers - MCU 8KB 10ADC
Manufacturer
Silicon Labs
Datasheet

Specifications of C8051F314R

Product Category
8-bit Microcontrollers - MCU
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
8 KB
Data Ram Size
1.25 KB
On-chip Adc
Yes
Operating Supply Voltage
2.7 V to 3.6 V
Package / Case
LQFP-32
Mounting Style
SMD/SMT
A/d Bit Size
10 bit
A/d Channels Available
17
Data Rom Size
128 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
29
Number Of Timers
5
On-chip Dac
No
Processor Series
C8051
Program Memory Type
Flash
Factory Pack Quantity
500
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
C8051F310/1/2/3/4/5/6/7
182
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
f
SCK
------------------------- -
2
2000000
SCR6
R/W
Bit6
R/W
Bit6
=
4
+
------------------------------------------------ -
2
SFR Definition 16.3. SPI0CKR: SPI0 Clock Rate
1
SFR Definition 16.4. SPI0DAT: SPI0 Data
SPI0CKR
SCR5
SYSCLK
R/W
Bit5
R/W
Bit5
SCR4
+
R/W
Bit4
R/W
Bit4
1
Rev. 1.7
SCR3
R/W
Bit3
R/W
Bit3
SCR2
R/W
Bit2
R/W
Bit2
SCR1
R/W
Bit1
R/W
Bit1
SFR Address: 0xA3
SFR Address: 0xA2
SCR0
R/W
Bit0
R/W
Bit0
00000000
Reset Value
00000000
Reset Value

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