R

V3020

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Typical Applications

V3020 Interfaced with Intel CPU (RD/WR Pulse)

Fig. 15

V3020 Interfaced with Motorola CPU (Advanced R/W)

Fig. 16

3 Wire Serial Interface

1)

With strobe low bits are written to the V3020, and with strobe high bits are read from the

V3020

2)

For serial ports with byte transfer only, an address command cycle should be combined with

every data cycle to give 8 address bits and 8 data bits. For example to read the current

minutes, write address data F + 2 (1111 + 0011) and then read 8 data bits.

Fig. 17