ATWILC1000B-MUT [DATASHEET]

Atmel-42491B-ATWILC1000B-MUT_Datasheet_03/2016

2

0

20

8

External Interfaces

ATWILC1000B external interfaces include:





SPI Slave and SDIO Slave for control and data transfer



SPI Master for external Flash





Two UARTs for debug, control, and data transfer



General Purpose Input/Output (GPIO) pins



Wi-Fi/Bluetooth coexistence interface

With the exception of the SPI Slave and SDIO Slave host interfaces, which are selected using the dedicated

SDIO_SPI_CFG pin, the other interfaces can be assigned to various pins by programming the corresponding

pin MUXing control register for each pin to a specific value between 0 and 6.The default values of these

registers are 0, which is GPIO mode. The summary of the available interfaces and their corresponding pin

MUX settings is shown in Table 8-1. For specific programming instructions, refer to ATWILC1000B

Programming Guide.

Table 8-1.

Pin-MUX Matrix of External Interfaces

8.1

consisting of a serial data line (SDA, Pin 33) and a serial clock (SCL, Pin 32). It responds to the seven bit

mode (with data rates up to 100Kb/s) and fast mode (with data rates up to 400Kb/s).

the SCL line is low, except for STOP, START, and RESTART conditions. The output drivers are open-drain to

perform wire-AND functions on the bus. The maximum number of devices on the bus is limited by only the

maximum capacitance specification of 400pF. Data is transmitted in byte packages.