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参数资料
型号： ST72F611F1B1
英文描述： 64Mb EDO/FPM - OBSOLETE
中文描述： ST7的-低速USB 8 - 3端点位MCU。闪存。内径。水分散粒剂。定时器
文件页数： 141/161页
文件大小： 2070K
代理商： ST72F611F1B1
ST72324
80/161
SERIAL PERIPHERAL INTERFACE (Cont’d)
10.4.3.2 Slave Select Management
As an alternative to using the SS pin to control the
Slave Select signal, the application can choose to
manage the Slave Select signal by software. This
is configured by the SSM bit in the SPICSR regis-
ter (see Figure 50)
In software management, the external SS pin is
free for other application uses and the internal SS
signal level is driven by writing to the SSI bit in the
SPICSR register.
In Master mode:
–SS internal must be held high continuously
In Slave Mode:
There are two cases depending on the data/clock
timing relationship (see Figure 49):
If CPHA=1 (data latched on 2nd clock edge):
–SS internal must be held low during the entire
transmission. This implies that in single slave
applications the SS pin either can be tied to
VSS, or made free for standard I/O by manag-
ing the SS function by software (SSM= 1 and
SSI=0 in the in the SPICSR register)
If CPHA=0 (data latched on 1st clock edge):
–SS internal must be held low during byte
transmission and pulled high between each
byte to allow the slave to write to the shift reg-
ister. If SS is not pulled high, a Write Collision
error will occur when the slave writes to the
shift register (see Section 10.4.5.3).
Figure 49. Generic SS Timing Diagram
Figure 50. Hardware/Software Slave Select Management
MOSI/MISO
Master SS
Slave SS
(if CPHA=0)
Slave SS
(if CPHA=1)
Byte 1
Byte 2
Byte 3
1
0
SS internal
SSM bit
SSI bit
SS external pin
相关PDF资料
PDF描述
ST72P621L4B1 LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS. FLASH OR ROM MEMORY. LVD. WDG. 10-BIT ADC. 2 TIMERS. SCI. SPI
ST72T213G1B3 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS
ST72T213G1B6 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS
ST72T213G1M3 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS
ST72T213G1M6 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS
相关代理商/技术参数
参数描述
ST72F621J4B1 功能描述:8位微控制器 -MCU Flash 16K USB/SPI/SC 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
ST72F621J4D0 功能描述:8位微控制器 -MCU Flash 16K USB/SPI/SC 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
ST72F621J4T1 功能描述:8位微控制器 -MCU ST7262 Lo Spd USB 8B MCU 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
ST72F621K4B1 功能描述:8位微控制器 -MCU Flash 16K USB/SPI/SC 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
ST72F621L4M1 功能描述:8位微控制器 -MCU Flash 16K USB/SPI/SC 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
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