C8051F317-GMR Silicon Laboratories Inc, C8051F317-GMR Datasheet - Page 182
C8051F317-GMR
Manufacturer Part Number
C8051F317-GMR
Description
MCU 8-Bit C8051F31x 8051 CISC 16KB Flash 3.3V 24-Pin QFN EP T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F310-TB.pdf
(228 pages)
Specifications of C8051F317-GMR
Package
24QFN EP
Device Core
8051
Family Name
C8051F31x
Maximum Speed
25 MHz
Ram Size
1.25 KB
Program Memory Size
16 KB
Operating Supply Voltage
3.3 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
21
Interface Type
I2C/SMBus/SPI/UART
On-chip Adc
17-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
4
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
C8051F317-GMR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
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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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