参数资料
型号: EM250-RCM-R
厂商: Silicon Laboratories Inc
文件页数: 39/124页
文件大小: 0K
描述: EM250 RCM BOARD
标准包装: 12
类型: 收发器,802.15.4/Zigbee
频率: 2.4GHz
适用于相关产品: EM250
其它名称: 636-1023
EM250
5.2
Serial Controller SC1
The EM250 SC1 module provides asynchronous (UART) or synchronous (SPI or I 2 C) serial communications. Figure
6 is a block diagram of the SC1 module.
CPU Interrupt
INT_EN
INT_CFG[5]
INT_FLAG[5]
0
OFF
INT_SC1CFG
INT_SC1FLAG
SC1_UARTPER/FRAC
Baud Generator
1
UART
SC1_UARTSTAT
SC1_UARTCFG
UART Controller
TXD
RXD
nRTS
nCTS
SC1_MODE
2
3
SPI
I2C
SC1_SPISTAT
SC1_SPICFG
SC1_RATELIN/EXP
SPI Master
Controller
Clock Generator
MCLK
MO
MI
SC1_DATA
SC1_I2CSTAT
SC1_I2CCTRL1
SC1_I2CCTRL2
I2C Master
Controller
MSCL
MSDA
TX-FIFO
SC1 TX DMA
channel
SC1_DMACTRL
SC1_RXCNTA/B
SC1_TXCNT
DMA
SC1_TX/RXBEGA/B
SC1 RX DMA
channel
Controller
SC1_DMASTAT
SC1_TX/RXENDA/B
SC1_RXERRA/B
RX-FIFO
Figure 6. SC1 Block Diagram
The full-duplex interface of the SC1 module can be configured into one of these three communication modes,
but it cannot run them simultaneously. To reduce the interrupt service requirements of the CPU, the SC1
module contains buffered data management schemes for the three modes. A dedicated, buffered DMA
controller is available to the SPI and UART controllers while a FIFO is available to all three modes. In addition,
a SC1 data register allows the software application direct access to the SC1 data within all three modes.
Finally, the SC1 routes the interface signals to GPIO pins. These are shared with other functions and are
controlled by the GPIO_CFG register. For selecting alternate pin functions, refer to Table 17 and Table 18.
Page 39
120-0082-000V Rev 1.1
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