SAP5SD-A-G1-R datasheet(14/67 Pages) RENESAS

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SAP51 / SAP5S Datasheet

January 28, 2016

Figure 3.2 shows the different data path configurations.

Figure 3.2

Data Path in Master and Repeater Modes

Master Mode

Slave Mode, AS-i Channel

More detailed signal descriptions can be found in sections 5.19 and 5.14.

3.2.1.

Slave Mode

The Slave Mode is the most complex operational mode of the SAP5. The SAP5 supports not only all mandatory

AS-i slave functions but also a variety of additional features that facilitate the design of AS-i slave modules.

3.2.2.

AS-i Communication Channel

The AS-i channel is directly connected to the AS-i bus via the pins LTGP and LTGN. A receiver and a transmitter

unit are connected in parallel to the pins, which allows fully bi-directional communication through LTGP and

LTGN.

3.2.3.

Parameter Port Pins

In the 20-pin package, the SAP5 features a 4-bit wide parameter port (P0, P1, P2, and P3 pins) and a related

parameter strobe signal pin PSTBn. AS-Interface Complete Specification V3.0 newly defines a bidirectional mode

for parameter data. The SAP5 supports this feature, which can be activated by special EEPROM setting

(IO_Code, see section 5.9).

There is a defined phase relation between a parameter output event, the parameter input sampling, and the

activation of the PSTBn signal. Therefore it can be used to trigger external logic or a microcontroller to process

the received parameter data or to provide new input data for the AS-i slave response.

See section 5.7 for further details.

3.2.4.

Data Port Pins

The SAP5 provides a 4-bit wide data port. The outputs work independently from each other allowing a maximum

of 4 output devices to be connected to the SAP5. The directions of the Data Port pins are set through the

IO_Code, see section 5.9.

AS-i Receiver

AS-i Transmitter

CMOS Input

LED Output

UART

ASI+

ASI-

(TX)

LED1

(RX)

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