C8051F002R Silicon Laboratories Inc, C8051F002R Datasheet - Page 126
C8051F002R
Manufacturer Part Number
C8051F002R
Description
IC 8051 MCU 32K FLASH 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F00xr
Specifications of C8051F002R
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
8
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 4x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1002-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F002R
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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in an “off-line” state. In a multiple-master environment, the system controller should check the state of the
SLVSEL flag (SPI0CN.2) to ensure the bus is free before setting the MSTEN bit and initiating a data transfer.
17.3.
As shown in Figure 17.4, four combinations of serial clock phase and polarity can be selected using the clock
control bits in the SPI Configuration Register (SPI0CFG). The CKPHA bit (SPI0CFG.7) selects one of two clock
phases (edge used to latch the data). The CKPOL bit (SPI0CFG.6) selects between an active-high or active-low
clock. Both master and slave devices must be configured to use the same clock phase and polarity. Note: the SPI
should be disabled (by clearing the SPIEN bit, SPI0CN.0) while changing the clock phase and polarity.
The SPI Clock Rate Register (SPI0CKR) as shown in Figure 17.7 controls the master mode serial clock frequency.
This register is ignored when operating in slave mode.
Serial Clock Timing
MISO/MOSI
SCK
(CKPOL = 0, CKPHA = 0)
SCK
(CKPOL = 0, CKPHA = 1)
SCK
(CKPOL = 1, CKPHA = 0)
SCK
(CKPOL = 1, CKPHA = 1)
NSS
Figure 17.4. Data/Clock Timing Diagram
MSB
Bit 6
Rev. 1.7
Bit 5
Bit 4
Bit 3
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
Bit 2
Bit 1
LSB
126
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