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参数资料
| 型号： | ST72E331J4D0 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42 |
| 封装： | 0.600 INCH, WINDOWED, CERAMIC, SDIP-42 |
| 文件页数： | 87/107页 |
| 文件大小： | 691K |
| 代理商： | ST72E331J4D0 |
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ST72E331 ST72T331
SERIAL PERIPHERAL INTERFACE (Cont’d)
5.6.7 Register Description
CONTROL REGISTER (CR)
Read/Write
Reset Value: 0000xxxx (0xh)
Bit 7 = SPIE
Serial peripheral interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SPI interrupt is generated whenever SPIF=1
or MODF=1 in the SR register
Bit 6 = SPE
Serial peripheral output enable.
This bit is set and cleared by software. It is also
cleared by hardware when, in master mode, SS=0
(see Section 0.1.4.5 Master Mode Fault).
0: I/O port connected to pins
1: SPI alternate functions connected to pins
The SPE bit is cleared by reset, so the SPI periph-
eral is not initially connected to the external pins.
Bit 5 = SPR2
Divider Enable.
this bit is set and cleared by software and it is
cleared by reset. It is used with the SPR[1:0] bits to
set the baud rate. Refer to Table 1.
0: Divider by 2 enabled
1: Divider by 2 disabled
Bit 4 = MSTR
Master.
This bit is set and cleared by software. It is also
cleared by hardware when, in master mode, SS=0
(see Section 0.1.4.5 Master Mode Fault).
0: Slave mode is selected
1: Master mode is selected, the function of the
SCK pin changes from an input to an output and
the functions of the MISO and MOSI pins are re-
versed.
Bit 3 = CPOL
Clock polarity.
This bit is set and cleared by software. This bit de-
termines the steady state of the serial Clock. The
CPOL bit affects both the master and slave
modes.
0: The steady state is a low value at the SCK pin.
1: The steady state is a high value at the SCK pin.
Bit 2 = CPHA
Clock phase.
This bit is set and cleared by software.
0: The first clock transition is the first data capture
edge.
1: The second clock transition is the first capture
edge.
Bit 1:0 = SPR[1:0]
Serial peripheral rate.
These bits are set and cleared by software.Used
with the SPR2 bit, they select one of six baud rates
to be used as the serial clock when the device is a
master.
These 2 bits have no effect in slave mode.
Table 18. Serial Peripheral Baud Rate
70
SPIE
SPE
SPR2
MSTR
CPOL
CPHA
SPR1
SPR0
Serial Clock
SPR2
SPR1
SPR0
fCPU/4
1
0
fCPU/8
0
fCPU/16
0
1
fCPU/32
1
0
fCPU/64
0
1
0
fCPU/128
0
1
80
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST72E331J4D0S | 功能描述:8位微控制器 -MCU UV EPROM 16K RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ST72E331N4D0 | 功能描述:8位微控制器 -MCU UV EPROM 16K RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ST72E331N4D0S | 功能描述:8位微控制器 -MCU UV EPROM 16K RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ST72E4K64-A75EC | 制造商:STEC Inc 功能描述:512MB DDR-266 ECC/REG - Bulk |
| ST72E4K64ML-C06E | 制造商:STEC Inc 功能描述:512MB 512MB DDR PC2700 REG/ECC |
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