参数资料
型号: C8051F300-TB
厂商: Silicon Laboratories Inc
文件页数: 7/178页
文件大小: 0K
描述: BOARD PROTOTYPING W/C8051F300
标准包装: 1
类型: MCU
适用于相关产品: C8051F300
所含物品:
C8051F300/1/2/3/4/5
104
Rev. 2.9
12.1. Priority Crossbar Decoder
The Priority Crossbar Decoder (Figure 12.3) assigns a priority to each I/O function, starting at the top with
UART0. When a digital resource is selected, the least significant unassigned Port pin is assigned to that
resource (excluding UART0, which is always at pins 4 and 5). If a Port pin is assigned, the Crossbar skips
that pin when assigning the next selected resource. Additionally, the Crossbar will skip Port pins whose
associated bits in the XBR0 register are set. The XBR0 register allows software to skip Port pins that are to
be used for analog input or GPIO.
Important Note on Crossbar Configuration: If a Port pin is claimed by a peripheral without use of the
Crossbar, its corresponding XBR0 bit should be set. This applies to P0.0 if VREF is enabled, P0.3 and/or
P0.2 if the external oscillator circuit is enabled, P0.6 if the ADC is configured to use the external conversion
start signal (CNVSTR), and any selected ADC or Comparator inputs. The Crossbar skips selected pins as
if they were already assigned, and moves to the next unassigned pin. Figure 12.3 shows the Crossbar
Decoder priority with no Port pins skipped (XBR0 = 0x00); Figure 12.4 shows the Crossbar Decoder prior-
ity with pins 6 and 2 skipped (XBR0 = 0x44).
Figure 12.3. Crossbar Priority Decoder with XBR0 = 0x00
VREF
x1
x2
CNVSTR
01
2345
67
00
0000
00
CEX2
CP0A
SYSCLK
CEX0
CEX1
S
ig
n
al
s
U
n
a
vai
lab
le
SF Signals
PIN I/O
TX0
RX0
SDA
SCL
P0
CP0
Port pin potentially available to peripheral
SF Signals
ECI
T0
T1
XBR0[0:7]
Special Function Signals are not assigned by the crossbar.
When these signals are enabled, the CrossBar must be
manually configured to skip their corresponding port pins.
Note: x1 refers to the XTAL1 signal; x2 refers to the XTAL2
signal.
相关PDF资料
PDF描述
0210391037 CABLE JUMPER 1MM .102M 33POS
C8051F226-TB BOARD PROTOTYPING W/C8051F226
C8051F330-TB BOARD PROTOTYPING W/C8051F330
LGU2G101MELA CAP ALUM 100UF 400V 20% SNAP
SDR-Q SCOTCH CODE REFILL Q
相关代理商/技术参数
参数描述
C8051F300-TB-K 功能描述:BOARD PROTOTYPING W/C8051F300 制造商:silicon labs 系列:- 零件状态:在售 板类型:评估平台 类型:MCU 8-位 核心处理器:8051 操作系统:- 平台:- 配套使用产品/相关产品:C8051F30x 安装类型:固定 内容:板 标准包装:1
C8051F301 功能描述:8位微控制器 -MCU 8KB 2%osc 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
C8051F301-GM 功能描述:8位微控制器 -MCU 8KB 11P 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
C8051F301-GMR 功能描述:8位微控制器 -MCU 8KB 11P 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
C8051F301-GS 功能描述:8位微控制器 -MCU 8KB Flash 2%osc 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