Pin on EXT
connector
Pin name
AT30TSE758A
temperature
sensor pin
Comment
-
A2
5
Address line for serial interface, shorted to GND
-
A1
6
Address line for serial interface, shorted to GND
-
A0
7
Address line for serial interface, shorted to GND
20
VCC
8
The temperature sensor has two I
2
C addresses; one for the temperature sensor and one for the
EEPROM. The addresses are "0b1001 A2 A1 A0" for the temperature sensor and "0b1010 A2 A1 A0" for
the EEPROM. The address selection lines (A2, A1, and A0) of the temperature sensor are shorted to
GND, which makes the default addresses 0b1001000 and 0b1010000. When communicating with the
EEPROM parts of the TWI address is used as a page address. For more details, refer to
(AT30TSE752A/754A/758A) Datasheet
5.3.3
Reset Switch
The ATBTLC1000ZR Xplained Pro contains footprint of switch (SW100) along with resistors R108, R102
and capacitor C102 that can be mounted to reset the ATBTLC1000ZR module. The switch is connected
to the CHIP_EN pin of the module.
Info:
When this switch is used to reset the device, the host MCU will lose the status of the
ATBTLC1000ZR device. It is recommended not to reset the device using this switch when it is
controlled by the host MCU.
5.3.4
Crystal
The ATBTLC1000ZR Xplained Pro has a 32.768 kHz RTC oscillator that is used for BLE activities
involving connection events. There is also provision to reconfigure the ATBTLC1000ZR Xplained Pro
board to bypass the external crystal oscillator with an external signal on the RTC_CLK_P pin of the
ATBTLC1000-ZR110CA module.
Table 5-9. Configuring the RTC Oscillator
Configuration option
Board configuration
32.768 kHz RTC oscillator
Open R101, Close J121
External signal on RTC_CLK_P
Close R101,R116,R117 and Open J121,J122
ATBTLC1000ZR-XPRO
©
2017 Microchip Technology Inc.
User Guide
DS50002637A-page 12
