MITSUBISHI
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.
PIN CONFIGURATION (TOP VIEW)
Read control input
LDI → 1 NC
20 19 18 17
VCC1 Power supply VCC2 Power supply CX1 Oscillation capacitor CX2 Oscillation capacitor
FEATURES
q Low current dissipation (0. 7mA when on standby as a standard) q Provided with glance-over selection input (4, 8, and 16 bits) q Provided with output polarity (“L” active or “H” active) switching input q Miniature mini-mold package q Wide operating temperature range Ta = -20 – 75°C
2
F2F output F2F ← 3 Noise filter PKO Differentiator input
4
M56710FP
PKI → 5
16 ← IB1 Ignore bit 1 15 ← IB2 Ignore bit 2 14 ← INV Invert input 13 → CLS Card travelling 12 → RDT Read data output 11 → RCP Read clock output
signal output
Amplifier output AMP ← 6 Amplifier (–) input HD2 → 7
APPLICATION
Magnetic card reader
Amplifier (+) input HD1 → 8 Standard voltage VRF output Grounding GND
9 10
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.
Outline 20P2N-A
NC: no connec...
M56710FP PDF File
