L7200

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SERIAL PORT

Figure 1. Serial Port Timing Information

SERIAL PORT OPERATION

The serial port interface is a bi-directional port for reading and writing programming data from/to the internal reg-

isters of this device. For data transfers SDEN is brought high, serial data is presented at the SDATA pin, and a

serial clock is applied to the SCLK pin. After the SDEN goes high , the first 16 pulses applied to the SCLK pin

will shift the data presented at the SDATA pin into an internal shift register on the rising edge of each clock. An

internal counter prevents more than 16 bits from being shifted into the register. The data in the shift register is

PARAMETER

MIN.

TYP.

MAX.

UNITS

ns

ns

ns

15

ns

12.5

ns

ns

ns

ns

SDEN

SCLK

SDATA

0A0

A6

A1

D0

D1

1st Byte

2nd Byte

Serial Port Write Timing

D2

D7

1A0

A6

A1

D0

D1

D7

1st Byte

2nd Byte

Serial Port Read Timing

SDEN

SCLK

SDATA