the device with the host MCU is through an I2C interface available at 20 pin header . Master I
2
C interface
of the ATWINC3400 has been provided as optional secondary I2C communication interface with the
crypto device.
Table 4-7. ATECC508A Connections
Pin on ATWINC3400-MR210CA module Function
35 I
2
C data
34 I
2
C clock
4.2.4 EEPROM
The ATWINC3400-XPRO features an external EEPROM. Master I
2
C interface of the ATWINC3400 is
used for communication with EEPROM. Provision to assemble EEPROM is given; however, the device is
not mounted in board (Part number- AT24MAC602-STUM-T, Reference number - U102) .
Table 4-8. EEPROM Connections
Pin on ATWINC3400-MR210CA module Function
35 I
2
C data
34 I
2
C clock
4.2.5 Test Points
Some test points are available for use on the board. TP101 and TP103 can be used in addition with SPI
interface lines for SDIO interface which needs some hardware rework. TP103, TP104, TP105, and TP106
can be used for PCM interface by appropriately disconnecting the multiplexed alternate functionality.
TP107, TP108, TP109, and TP110 pins are GPIO38, 39, 40, and 42 pins of the ATWINC3400 chip
respectively.
Table 4-9. Test Point Connections
Test Point Pin on ATWINC3400-MR210CA
module
Function
TP101 22 GPIO8; Pin multiplexed with
optional BT_UART1_CTS2
TP102 27 GPIO7; Pin multiplexed with
optional BT_UART1_RTS2
TP103 29 GPIO17; Pin multiplexed with
dual LED D101 (Green)
TP104 30 GPIO18; Pin multiplexed with
dual LED D101 (Red)
TP105 31 GPIO19
TP106 32 GPIO20
ATWINC3400-XPRO
Hardware Users Guide
© 2017 Microchip Technology Inc.
User Guide
DS50002702A-page 11
