SN250 datasheet(68/130 Pages) STMICROELECTRONICS

Part #	SN250

Description	Single-chip ZigBee/802.15.4 solution

PDF	130 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Functional description—application modules

SN250

68/130

7.3

Serial controller SC2

The SN250 SC2 module provides synchronous (SPI or I2C) serial communications. Figure 8

is a block diagram of the SC2 module.

Figure 8.

SC2 block diagram

The full-duplex interface of the SC2 module can be configured into one of these two

communication modes, but it cannot run them simultaneously. To reduce the interrupt

service requirements of the CPU, the SC2 module contains buffered data management

schemes. A dedicated, buffered DMA controller is available to the SPI while a FIFO is

available to both modes. In addition, a SC2 data register allows the software application

direct access to the SC2 data. Finally, the SC2 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, please refer to Table 17 and Table 18.

SN250 Datasheet(PDF) 68 Page - STMicroelectronics