ISL97635A datasheet(24/29 Pages) RENESAS

24 / 29 page

ISL97635A

FN6564 Rev.3.00

Page 24 of 29

Sep 26, 2017

Configuration Register (0x08)

The Configuration Register allows users to set 2 levels of channel

Short-Circuit thresholds or disable it. It also allows users to set

the boost conversion switching frequency between 1.2MHz and

600kHz.

The bit assignment is shown in Figure 29. Default value for

Output Channel Mask/Fault Readout

This register can be read or write; the bit position corresponds to

the channel. For example, Bit 0 corresponds to Ch0 and bit 5

corresponds to Ch5 and so on. When writing data to this register,

it enables the channels of interest. When reading data from this

read as 0. This allows the user to determine which channel is

faulty and optionally not enabling it to allow the rest of the

system to continue to function. Additionally, a faulted out

channel can be disabled and re-enabled in order to allow a retry

for any faulty channel without having to power-down the other

channels.

The bit assignment is shown in Figure 30. Default for register

0x09 is 0xFF.

CONFIGURATION REGISTER

RESERVED

FSW

VSC1

VSC0

Bit 7 (R/W)

Bit 6 (R/W)

Bit 5 (R/W)

Bit 4 (R/W)

Bit 3 (R/W)

Bit 2 (R/W)

Bit 1 (R/W)

Bit 0 (R/W)

BIT ASSIGNMENT

BIT FIELD DEFINITIONS

VSC[1..0]

2 levels of Short-Circuit Thresholds (1 = 8V, 0 = 3.1V, accuracy ±15%)

FSW[2]

2 levels of Switching Frequencies (1 = 1,200kHz, 0 = 600kHz)

FIGURE 29. DESCRIPTIONS OF CONFIGURATION REGISTER

FIGURE 30. OUTPUT CHANNEL REGISTER

OUTPUT CHANNEL REGISTER

RESERVED

CH5

CH4

CH3

CH2

CH1

CH0

Bit 7 (R/W)

Bit 6 (R/W)

Bit 5 (R/W)

Bit 4 (R/W)

Bit 3 (R/W)

Bit 2 (R/W)

Bit 1 (R/W)

Bit 0 (R/W)

BIT ASSIGNMENT

BIT FIELD DEFINITIONS

CH[5..0]

CH5 = Channel 5, CH4 = Channel 4 and so on

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