AATIAN17 Datasheet, PDF (3/6 Pages) SiGe Semiconductor, Inc. – I2C/S2Cwire™ Controller

EV-125
I²C/S²Cwire™ Controller
with AAT1142 Demo Board
External Power Source
This controller board can be powered either from the AAT1142 demo board through the ribbon cable¹ or from
a separate power supply. To use a separate external power source, simply disconnect the VCC pin from the
controller board, then connect an external power supply to the power post. The input voltage of the controller
board can be in the range of 2.5V to 5.5V. For detailed information regarding the V_IL or V_IH level of the I²C bus,
please read the I²C specification or refer to the Electrical Characteristic table in the AAT1142 product datasheet.
I²C and S²Cwire Switch
This switch changes the communication protocol between I²C and S²Cwire.
Button(s) Pushed
Up (SW1)
Down (SW2)
Reset (SW3)
Description
[Push/Release once] Increment +50mV output voltage level.
[Holding 1.5 sec.+] Auto-increment one voltage level per second.
[Push/Release once] Decrement -50mV output voltage level.
[Holding 1.5 sec.+] Auto-decrement one voltage level per second.
[Push/Release once at I²C mode] Set to the lowest voltage level (0.6V).
[Push/Release once at S²Cwire mode] Set to the lowest voltage level of S²Cwire (0.65V).
[Holding 1.5 sec. at S²Cwire mode] Disables output, disabling DC output² (0V), and then
return to lowest voltage level of S²Cwire (0.65V).
Table 1: User Interface Functionality.
1. When using the common power source, R3 on the AAT1142 demo board must be shorted.
2. On/Off control using the I²C interface is accomplished by applying or removing the DC input voltage.
EV-125.2006.08.1.1
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