ISL24201

9

FN7586.1

December 9, 2010

ISL24201 Programming

shows the serial data format for writing the register and

programming the EEPROM. Figure 14 shows the serial data

format for reading the DAC register. Table 2 shows the truth table

for reading and writing the device.

Programming the EEPROM memory transfers the current DAC

register value to the EEPROM and occurs when the control bits

After the EEPROM programming cycle is started, the WP pin can

be returned to logic low while the while it completes, which takes

a maximum of 100ms.

complete read and write protocol is shown in Figures 13 and 14.

(see Table 3). This should not cause a problem in most systems,

ensure they are compatible with the ISL24201.

~1ms

100ms

Max

2.7mA

200µA

50µA

90µA

25µA

PROGRAMMING

FIGURE 12. EEPROM PROGRAMMING FLOWCHART

E rase P u ls e

Sta rt EE P R O M

P ro g ra mmin g

Are EEPRO M

Ce lls E ra s e d ?

No

Ye s

W rite P u ls e

Are

EEPR O M C e lls

P rog ra m m e d?

EEPR O M

P ro g ra mmin g

Co m p le te

No

Ye s

TABLE 2. ISL24201 READ AND WRITE CONTROL

WP PIN

FUNCTION

R/W

PROGRAM

0

1

X

Read Register.

0

0

1

transactions. Will not write to

register

0

0

0

transactions. Will not write to

EEPROM.

1

1

X

Read DAC Register

10

1

Write DAC Register

10

0

Program EEPROM

SYMBOL

ISL24201

0.55V

1.44V