Ver 1.5

17/03/29

10

ES166

LCR/DMM analog front

1.4 Power & I/O level selection

The ES166 provide a flexible I/O level setting for different MCU system configuration.

The uPVCC (pin19) should be connected to the same potential of external Vcc of MCU.

The uPVCC is allowed to be set between DGND ~ V+. The IOCTRL (pin14) selects the

Vss level of MCU. If IOCTRL is set to DGND, the Vss level of MCU is the same as

DGND. If IOCTRL is set to V-, the Vss level of MCU is the same as V-.

ES166

GND

I/O_CTRL

uP_VCC

V+

V-

C+

C-

-3V

+3V

SCLK

SDATA

DATA_new

BUZOUT

CS

-3V

+3V

Type I