AS1163 datasheet(33/91 Pages) AMSOSRAM

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AS1163

Functional description

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DS001075 • v2-00 • 2025-Nov-21

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Information:

The host is fully responsible for the timing of the telegrams propagating in the network and, in

particular, for collision avoidance.

Instead of setting the parallel mask in the OTP, it can also be configured via channel 2 pins,

see next section. Parallel addressing is fully supported only with fully symmetrical

communication modes, such as SPI-mode, LVDS mode, CAN mode (USE mode). Pure MCU

mode will result in communication errors at parallel devices that are not addressed, while MCU

- SPI mode supports parallel communication, given its symmetry in downstream and upstream

flows.

6.5.2

Parallel address setting with open-short

It is possible to configure 2 LED drivers to receive altogether 2 analog voltage signals that are

to be forced externally. Possible configurations are three: Ground shorted, VDD shorted, or

thirdly at VDD/2 voltage level, e.g. by resistive ladder.

The LED driver is turned-OFF (high-Z) and in combination with an external resistor divider will

set the output voltage.

The 2 analog voltages are digitized by the open-short comparators and result in 9 possible

parallel address codes.

The parallel mask configuration is read once at startup.

Table 10: Address mask configuration

Internal bits

Corresponding parallel address

VDD/2

00 00

0b000

VDD/2

GND

00 01

0b001

VDD/2

VDD

00 10

0b010

GND

VDD/2

01 00

0b011

GND

01 01

0b100

GND

VDD

01 10

0b101

VDD

VDD/2

10 00

0b110

VDD

GND

10 01

0b111

AS1163 Datasheet(PDF) 33 Page - ams-OSRAM AG

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