11. Function Description

Microprocessor Interface

FS511 can be directly connected to any microprocessor by pins of CS_, SK, DI, DO/IRQO. It can access

the read/write of the control registers, handle interrupts, and access the measure registers.

D<6>

D<5>

D<4>

D<3>

D<2>

D<1>

D<7>

D<0>

0

A<1>

A<0>

CS_

DI

DO

SK

IRQO

Writing Mode

……

…

A<2>

A<1>

A<0>

CS_

DI

DO

SK

IRQO

Reading Mode

……………

……

D<7>

D<6>

D<0>

D<1>

D<2>

D<3>

D<4>

D<5>

IRQO

…

1

0

0

CS_

DI

DO

SK

IRQO

Reading ADC

……………

……

D<23>

D<22>

D<0>

D<1>

IRQO

…

D<21>

D<2>

……………

……………

If ADC Data converse complete, IRQO will be high to Low.

Power System

11..1

Analog power (VDD, VSSA) and Digital power (VCC, VSS)

ADC, OPAMP and analog circuit used Analog power (VDD, VSSA). VDD typically is 5V.

Digital Interface and Digital circuit used Digital power (VCC, VSS).

11..2

Switch-able Power Output

ENVS

VDD

VS

Terminals of VS is the switch-able power output of VDD. The PMOS switch is controlled by ENVS control signal.

When ENVS = 1, the switch is short.