Mitsubishi M56710FP Datasheet

MITSUBISHI <CONTROL / DRIVER IC>

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M56710FP

F2F MAGNETIC STRIPE ENCORDING CARD READER

DESCRIPTION

The M56710FP is a semiconductor integrated circuit of BiCMOS
structure having an F2F demodulator function for magnetic card
reader.

FEATURES

●Low current dissipation (0.7mA when on standby as a standard)

●Provided with glance-over selection input (4, 8, and 16 bits)

●Provided with output polarity (“L” active or “H” active) switching

input

●Miniature mini-mold package

●Wide operating temperature range Ta = -20 – 75°C

APPLICATION

Magnetic card reader

FUNCTION

Data signal which is read from magnetic card via magnetic head is
input from HD2 and HD1 pins, and converted into F2F pattern
signal by analog processing in amplifier OP1, differentiator OP2,
sensitivity setting circuit and waveform shaping circuit. If F2F signal
is input, the logic section glances over the prescribed number of
bits set by IB1 and IB2 input before performing digital processing,
and then outputs card reading signal CLS, read clock signal RCP,
and read data signal RDT. INV turning to “L” switches each output
of CLS, RCP and RDT from “L” active to “H” active.

• STANDARD BITS:

Let the number of glance-over bits set by IB1 and IB2 be M.
Let the Mth FC (flux change) through M+1st FC after LDI input is
turned from “L” to “H” be a standard bit with a time width of TB0.
I/O is discriminated from the next bit to this standard bit as a data
bit.

PIN CONFIGURATION(TOP VIEW

→

Read control input

F2F output

Noise filter

Differentiator input

Amplifier output
Amplifier (–) input
Amplifier (+) input

Standard voltage

output

Grounding

LDI
NC

F2F

PKO

PKI

AMP

HD2
HD1
VRF

GND

1
2

←

3
4

→
←
→
→

9

20
19
18

M56710FP

17
165
156
147
138
12
1110

Outline 20P2N-A

• I/O discrimination

Let the data bit time width of a data bit be TBn, and if there is one
next FC between the FC at the end of that bit (i.e. the beginning
of the next bit) to 5/7TBn, let the next bit (Bn+1) be data “1”, and,
if there is no FC, be data “0”.

• Output signal time width

When letting the oscillation cycle of oscillation circuit be TOSC,

• RCP output pulse width TOW•••••••••••••••••••••••about 16TOSC

• RCP delay time to RDT•••••••••••••••••••••••••••••••about 8TOSC

VCC1
VCC2
CX1
CX2

←

IB1

←

IB2

←

INV

→

CLS

→

RDT

→

RCP

Power supply
Power supply
Oscillation capacitor
Oscillation capacitor
Ignore bit 1
Ignore bit 2
Invert input

Card travelling
signal output

Read data output
Read clock output

NC: no connection

BLOCK DIAGRAM

Amplifier (-) input

Amplifier (+) input

e output

Read control input

Ignore bit 2

HD2
HD1

VRFReference volta

LDI

IB2

IB1Ignore bit 1

CX2Oscillation capacito
CX1Oscillation capacitor

Amplifier
output

7
8

9

Reference
voltage
circuit

1

15

16

17

Oscillation
circuit

18

AMP

OP1

T

OSC

Differentiator
input

6

1/5

1/7

PKI

5

OP2

Control circuit

5T

OSC

7TOSC

Noise filter

PKO

4

Sensitivity
setting

11 bit

downcounter

11 bit

upcounter

Waveform
shaping

F2F output

F2F

3

20

19

14

13

12

11

10

Power supply

VCC1
V

CC2

Power supply

INV

Invert input

CLS

Card travelling signal output

RDT

Read data output

RCP

Read clock output

GND

I/O CIRCUIT

MITSUBISHI <CONTROL / DRIVER IC>

M56710FP

F2F MAGNETIC STRIPE ENCORDING CARD READER

1 2

3

LDI, IB1, IB2 input circuit INV input circuit

CC2

V

LDI
IB1
IB2

GND

CLS, RDT, RCP output circuit

VCC2

CLS
RDT
RCP

GND

INV

V

CC2

GND

PIN FUNCTION DESCRIPTION

Pin
No.

10
11
12
13
14
15
16
17
18
19
20

Pin

name

1

LDI

Read control input

3

F2F

F2F output

4

PKO

Noise filter

5

PKI

Differentiator input

6

AMP

Amplifier output

7

HD2

Amplifier (–) input

8

HD1

Amplifier (+) input

9

VRF

Reference voltage output

GND

Grounding

RCP

Read clock output

RDT

Read data output

CLS

Card travelling signal output

INV

Invert input

IB2

Ignore bit 2

IB1

Ignore bit 1

CX2

Oscillation capacitor

CX1

Oscillation capacitor

V

Power supply

CC2

Power supply

VCC1

Name Function

Schmidt trigger input. At “L”, reset the internal digital circuit. At “H”, F2F modulation is possible.

F2F signal output that has amplified, differentiated and further waveform-shaped the magnetic head signal.

Connect noise removing capacitor CNF between PKI and PKO.
Refer to PKO and AMP.
Connect resistor RPK and capacitor CPK between AMP and PKI.
Connect magnetic head between HD1 and HD2.
Connect magnetic head between HD1 and HD2.
Reference voltage output of Vcc 1/2

Clock pulse output after F2F modulation
Data output after F2F modulation
Signal output indicating that card is travelling
CLS, RDT and RCP output becomes “L” active at “H” (OPEN), and “H” active at “L”.
Glance-over bit setting pin
Glance-over bit setting pin
Connect capacitor C
Connect capacitor C

OSC between CX1 and CX2 to set oscillation frequency.
OSC between CX1 and CX2 to set oscillation frequency.

Digital circuit section power supply pin. Supply voltage is Vcc.
Analog circuit section power supply pin. Supply voltage is Vcc (same voltage as Vcc

2).

F2F MAGNETIC STRIPE ENCORDING CARD READER

”

GLANCE-OVER BIT SETTING AND TIMING BY IB1 AND IB2

IB2 input IB1 input

LL

LH

HL

Number of

glance-over bits

4

8

16

Description

• Internal digital circuit is reset with LDI input at “L”.

• LDI input may be at “H” at all times.

• CLS output turns to “L” after counting the flux change

FC (change in the status of F2F) of the number of
glance-over bits, and returns to “H” when BIC (bit
interval counter) has fully counted. (At “L” active).

MITSUBISHI <CONTROL / DRIVER IC>

M56710FP

HH

——

• IB2, IB1: “L”, “L”

x1234

F2F

LDI

BIC
full count

CLS

OPERATING TIMING DIAGRAM

INV : “H”

HD2 - HD1

F2F

LDI

(5/7)

IB2, IB1 : “L”, “L

Bit 1/0 discrimination signal

TBO : Reference bit

About 14300 T

TB0 TBn

Reference bit

OSC

TBn+

5/7TBn

CLS

RCP

RDT

HD2 - HD1

F2F

LDI

(5/7)

CLS

RCP

000 0 100000010110 0

RDT

0000 10110

RDT data is output 1 bit behind F2F data.