Rainbow-electronics MAX6871 Manual do Utilizador descarregar pdf (Página 18)

MAX6870/MAX6871

MARGIN

MARGIN allows system-level testing while power sup-

plies exceed the normal ranges. Registers 41h and 42h

determine whether the programmable outputs assert to

a predetermined state or hold the last state as MARGIN

is driven low (Table 8). Drive MARGIN low to set the

programmable outputs in a known state while system-

level testing occurs. Leave MARGIN unconnected or

connect to DBP if unused. An internal 10µA current

source pulls MARGIN to DBP. The internal ADC contin-

ually monitors IN_ while MARGIN is low. The state of

each programmable output does not change while

MARGIN = GND. MARGIN overrides MR if both assert at

the same time.

EEPROM-Programmable Hex/Quad

Power-Supply Sequencers/Supervisors with ADC

18 ______________________________________________________________________________________

Table 8. Programmable Output Behavior and MARGIN

REGISTER

ADDRESS

EEPROM

MEMORY

ADDRESS

BIT

RANGE

AFFECTED OUTPUT DESCRIPTION

[0]

PO1

(MAX6870 only)

0 = output held in existing state.

1 = output asserts high or low (see 42h[0]).

[1]

PO2

(MAX6870 only)

0 = output held in existing state.

1 = output asserts high or low (see 42h[1]).

[2]

PO3 (MAX6870)

PO1 (MAX6871)

0 = output held in existing state.

1 = output asserts high or low (see 42h[2]).

[3]

PO4 (MAX6870)

PO2 (MAX6871)

0 = output held in existing state.

1 = output asserts high or low (see 42h[3]).

[4]

PO5 (MAX6870)

PO3 (MAX6871)

0 = output held in existing state.

1 = output asserts high or low (see 42h[4]).

[5]

PO6 (MAX6870)

PO4 (MAX6871)

0 = output held in existing state.

1 = output asserts high or low (see 42h[5]).

[6]

PO7 (MAX6870)

PO5 (MAX6871)

0 = output held in existing state.

1 = output asserts high or low (see 42h[6]).

41h 8041h

[7]

PO8

(MAX6870 only)

0 = output held in existing state.

1 = output asserts high or low (see 42h[7]).

[0]

PO1

(MAX6870 only)

0 = output asserts low if 41h[0] = 1.

1 = output asserts high if 41h[0] = 1.

[1]

PO2

(MAX6870 only)

0 = output asserts low if 41h[1] = 1.

1 = output asserts high if 41h[1] = 1.

[2]

PO3 (MAX6870)

PO1 (MAX6871)

0 = output asserts low if 41h[2] = 1.

1 = output asserts high if 41h[2] = 1.

[3]

PO4 (MAX6870)

PO2 (MAX6871)

0 = output asserts low if 41h[3] = 1.

1 = output asserts high if 41h[3] = 1.

[4]

PO5 (MAX6870)

PO3 (MAX6871)

0 = output asserts low if 41h[4] = 1.

1 = output asserts high if 41h[4] = 1.

[5]

PO6 (MAX6870)

PO4 (MAX6871)

0 = output asserts low if 41h[5] = 1.

1 = output asserts high if 41h[5] = 1.

[6]

PO7 (MAX6870)

PO5 (MAX6871)

0 = output asserts low if 41h[6] = 1.

1 = output asserts high if 41h[6] = 1.

42h 8042h

[7]

PO8

(MAX6870 only)

0 = output asserts low if 41h[7] = 1.

1 = output asserts high if 41h[7] = 1.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 50 51

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