¡ Semiconductor

MSM58321

13

1

PIN DESCRIPTION

Name

Pin No.

Description

WRITE

13

2

Chip select pins. These pins enable the interface with the external circuit when

both of these pins are set at H level simultaneously.

If one of these pins is set at L level, STOP, TEST, WRITE, READ, ADDRESS

is to be connected to the microcontroller.

WRITE pin is used to write data; it is activated when it is at the H level. Data bus

data inside the IC is loaded to the object digit while this WRITE pin is at the H

level, not at the WRITE input edge. Refer to Figure 1 below.

SR

Q

SR

Q

D0

D3

(S1 digit)

WRITE

D0

D1

D2

D3

DATA BUS

S1

CS1 = CS2 = "H"

D0

H

S1

WRITE

F/F D0-

θ

Figure 1