CYPRES S6AL211A94 Manuale - Pagina 9

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2.2

Description of Functions

2.2.1

Data Format and Timing

The data format and timing of the UART communication is shown below.

IF1

IF2

Start bit

Stop bit

Data to be transmitted and received, all are treated as ASCII character code.

Valid send and receive data is numbers and uppercase and control characters.

Received data length is within 24 byte.When continuous reception<CR>(ASCII code:0Dh) and <LF>(ASCII

code:0Ah) within 24 byte, it is interpreted as the delimiter of receive data. Next received data of continuous

reception of<CR>, <LF>are treated as 1st byte data.

If there is no delimiter is within 24 byte, received data of 24 byte will be discarded. And 25th received byte

data are treated as 1st byte data.

If the received string is a valid control commands, this device output response.

S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B

Figure 1. UART Data Format and Timing

24 characters or less

ASCII code

> 1ms

0Ah(=<LF>)

≦ 4ms

4Fh(="O")

≒ 2ms

S 0Dh(=<CR>)

4Bh(="K")

S 0Dh(=<CR>)

About Corresponded UART Interface

0Ah(=<LF>)

t (s)

0Ah(=<LF>)

> 0s