参数资料
型号: C8051F002R
厂商: Silicon Laboratories Inc
文件页数: 32/171页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 32LQFP
标准包装: 1
系列: C8051F00x
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SMBus(2 线/I²C),SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,温度传感器,WDT
输入/输出数: 8
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
数据转换器: A/D 4x12b; D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 32-LQFP
包装: 剪切带 (CT)
其它名称: 336-1002-1
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
17.4.
SPI Special Function Registers
The SPI is accessed and controlled through four special function registers in the system controller: SPI0CN Control
Register, SPI0DAT Data Register, SPI0CFG Configuration Register, and SPI0CKR Clock Rate Register. The four
special function registers related to the operation of the SPI Bus are described in the following section.
Figure 17.5. SPI0CFG: SPI Configuration Register
R/W
R
R/W
Reset Value
CKPHA
CKPOL
BC2
BC1
BC0
SPIFRS2
SPIFRS1
SPIFRS0
00000111
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0x9A
Bit7:
CKPHA: SPI Clock Phase.
This bit controls the SPI clock phase.
0: Data sampled on first edge of SCK period.
1: Data sampled on second edge of SCK period.
Bit6:
CKPOL: SPI Clock Polarity.
This bit controls the SPI clock polarity.
0: SCK line low in idle state.
1: SCK line high in idle state.
Bits5-3: BC2-BC0: SPI Bit Count.
Indicates which of the up to 8 bits of the SPI word have been transmitted.
BC2-BC0
Bit Transmitted
0
Bit 0 (LSB)
0
1
Bit 1
0
1
0
Bit 2
0
1
Bit 3
1
0
Bit 4
1
0
1
Bit 5
1
0
Bit 6
1
Bit 7 (MSB)
Bits2-0: SPIFRS2-SPIFRS0: SPI Frame Size.
These three bits determine the number of bits to shift in/out of the SPI shift register
during a data transfer in master mode. They are ignored in slave mode.
SPIFRS
Bits Shifted
0
1
0
1
2
0
1
0
3
0
1
4
1
0
5
1
0
1
6
1
0
7
1
8
.
127
Rev. 1.7
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