Pr

eliminar

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Solid-State Fingerprint Sensor

2

Fujitsu Microelectronics, Inc.

After the row capture is completed, the High-Order ColumnAddress

Register (CAH) and Low-Order ColumnAddress Register (CAL)

must be programmed to select an element within the captured row to

be digitized. Writing to CAL causes the analog-to-digital (A/D)

converter to digitize the difference between the outputs of the two

sample-and-holds of the selected column cell.The output of theA/D

converter is accessed by reading the CAL register.

Rows can be accessed in any order; however, the selected row must be

captured before the column cells are read.The column cells within a

row can be accessed in any order.

Special Features

There are two programmable open-drain outputs that can be used

for driving LEDs.

The CLKOUT pin can be enabled to output a square-wave clock of

the same frequency as the oscillator clock. CLKOUT can be used to

drive external circuitry. When ENCLK is high, the clock signal is

present at the CLKOUT pin. When ENCLK is low or unconnected,

the CLKOUT output is held low.

MBF110 Pin Information for SOP (VSPA) 80/1

Pin

Number

Pin

Name

Type

Description

Notes

34

A3

Input

Address Inputs

Address signals connected to these pins select a register to read from or write to dur-

ing data transfer.

35

A2

36

A1

37

A0

38

CE1

Chip Enable, Active Low

When CE1 is low and CE2 is high, the chip is selected.

39

CE2

Chip Enable, Active High

When CE1 is low and CE2 is high, the chip is selected.

40

RD

Read Enable, Active Low

This pin must be low while WR is high and the chip selected in order to read a register

on the chip.

17

WR

Write Enable, Active Low

This pin must be low while the chip is selected to write to a register on the chip.

18

D7

Bi-directional

Data Bus

Inputs when WR is low and chip is selected. Outputs when RD is low, WR is high, and

chip is selected.

19

D6

21

D5

22

D4

24

D3

25

D2

26

D1

27

D0

32

CLKOUT

Output

Clock Output

This pin outputs the oscillator clock frequency when ENCLK is high.

31

ENCLK

Input

Enable Clock Output

A high on this pin enables the CLKOUT pin. A low on this pin holds CLKOUT low.

ENCLK has an internal pull-down resistor.

15

LED1

Open-drain

Output

LED driver

This pin can be used to drive an LED.

14

LED2

Open-drain

Output

3

SETCUR

Input

Set Discharge Current

Place an external resistor R1 (200K – 680K ohms) between this pin and ground.

Typical: FPS110, R1 = 680K; FPS110B, R1 = 200K; FPS110E, R1 = 200K

2

N/A

Reserved pin

Must be left disconnected.

13

TEST

20, 33

Power

Digital Power Supply

Analog Power Supply