ver. 1.7

12/01/12

13

ES51997(60000counts)

DMM Analog front end

1.3 Power & I/O level selection

The ES51997 provide a flexible I/O level setting for different MPU system configuration.

The uP_VCC should be connected to the same potential of external Vcc of MCU. The

uP_VCC is allowed to be set between DGND ~ V+. The IO_CTRL pin selects the Vss level

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

IO_CTRL is set to V-, the Vss level of MCU is the same as V-.