Bit

Name

CH

Value

Description

Bit 6

THERM

A/B

1

If thermal protection is active (OTF=1), all VSEL bits are

reset to “0” and LNB output (VOUT pin) is disabled (both

section A and B). VSEL bits must be set again by the

master after the overtemperature condition is removed

(OTF=0)

0

In the case of thermal protection activation (OTF=1) the

LNB output (VOUT pin) is automatically enabled as soon

as the overtemperature condition is removed (OTF=0) with

the previous VSEL bit setting

Bit 7 (MSB)

COMP

1

DC-DC converter compensation. Set to use very low

E.S.R. capacitors or ceramic caps on VUP pin

0

DC-DC converter compensation. Set to use standard

electrolytic capacitors on VUP pin

7.4

Status registers

The STATUS 1, 2 registers can be addressed to read mode only and provide the diagnostic functions described in

the following tables.

Bit

Name

CH

Value

Description

Bit 0 (LSB)

OLF-A

A

1

0

No overload protection has been triggered to VOUT pin

Bit 1

OLF-B

B

1

0

No overload protection has been triggered to VOUT pin

Bit 2

VMON-A

A

1

Output voltage (VOUT pin) is lower than VMON

specification thresholds. Refer to Table 16. Output voltage

diagnostic (VMON-A/B bits, STATUS 1 register)

characteristics

0

Output voltage (VOUT pin) is within the VMON

specifications

Bit 3

VMON-B

B

1

Output voltage (VOUT pin) is lower than VMON

specification thresholds. Refer to Table 16. Output voltage

diagnostic (VMON-A/B bits, STATUS 1 register)

characteristics

0

Output voltage (VOUT pin) is within the VMON

specifications

Bit 4

PDO-A

A

1

Overcurrent detected on output pull-down stage for a time

longer than the deglitch period. This may happen due to an

external voltage source present on the LNB output (VOUT

pin)

0

No overcurrent detected on output pull-down stage

Bit 5

PDO-B

B

1

Overcurrent detected on output pull-down stage for a time

longer than the deglitch period. This may happen due to an

external voltage source present on the LNB output (VOUT

pin)

0

No overcurrent detected on output pull-down stage

LNBH26S

Status registers

DS8975 - Rev 5

page 20/35