ML6692 datasheet(14/21 Pages) MICRO-LINEAR

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ML6692

INITIALIZATION INTERFACE

The ML6692 has an Initialization Interface to allow

Management Interface. The intitialization data is loaded

at power-up and cannot be changed afterwards. The pin

EDIN selects one of three possible programming modes.

The Initialization Register bit assignment is shown in

Table 1.

EEPROM PROGRAMMING

With EDIN floating (set to a high impedance), the

ML6692 reads the 16 configuration bits from an external

serial EEPROM (93LC46 or similar) using the industry-

standard 3-wire serial I/O protocol. After power up, the

ML6692 automatically generates the address at EDIN and

the clock at ECLK to read out the 16 configuration bits.

The EEPROM generates the configuration bit stream at

EDOUT, synchronized with ECLK. Interface timing is

shown in Figure 6. It is important to note that the ML6692

expects LSBs first, whereas the 93LC46 shifts MSBs out

first. Therefore, the data pattern must be reversed before

programming it into the EEPROM.

MICROCONTROLLER PROGRAMMING

With EDIN high, the ML6692 expects the 16

configuration bits transfered directly at EDOUT,

synchronized with the first 16 clock rising edges provided

externally at ECLK after power-up. This mode is useful

with a small microcontroller; one controller can program

several ML6692 parts by selectively toggling their ECLK

pins. Interface timing is shown in Figure 7.

ML6692 HARD-WIRED DEFAULT

With EDIN low, the SEL10HD, SEL10FD, and SEL100T4

pins set their corresponding bits in the management status

only.

FUNCTION OF RELATED PINS

EDIN

MODE

SEL10FD/ECLK

SEL100T4/EDOUT

SEL10HD

Floating

EEPROM

ECLK (Output Clock

EDOUT (Input Data

No Affect

(EEPROM ADDR)

to EEPROM)

from EEPROM)

High

Microcontroller

ECLK (Input Clock

EDOUT (Input Data

No Affect

from Microcontroller) from Microcontroller)

Low

Hardwired

SEL10FD

SEL100T4

SEL10HD

(Initialization bit 9)

(Initialization bit 8)

(Initialization bit 10)

EDOUT

(DRIVEN BY

EEPROM)

ECLK

(DRIVEN BY

ML6692)

EDIN

(DRIVEN BY

ML6692)

OP1

OP0

D14

D15

tDV1

16 BITS DATA ADDRESS

tPW1

tPW2

tPER1

Figure 6. EEPROM Interface Timing

EDOUT

(INPUT TO

ML6692)

ECLK

(INPUT TO

ML6692)

tS1

tH1

tPW4

tPER2

tPW3

Figure 7. Microcontroller Mode Interface Timing

ML6692 Datasheet(PDF) 14 Page - Micro Linear Corporation

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