MAX17823BGCV datasheet(47/121 Pages) MAXIM

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MAX17823B

12-Channel High-Voltage Data Acquisition System

www.maximintegrated.com

Maxim Integrated | 47

Data Characters

Each data character contains a single-nibble (four-bit) payload and so two characters must be transmitted for each

byte of data. All data is transmitted least-significant bit, least-significant nibble, and least significant byte first. The

data itself is Manchester-encoded meaning that each data bit is followed by its complement. If the UART detects a

Manchester-encoding error in any received data character, it will set the ALRTMAN bit in the STATUS register.

The parity is even meaning that the parity bit’s value should always result in an even number of logic one bits in the

character. Given that the data is Manchester-encoded and that there are two stop bits, the parity bit for data

characters is always transmitted as a logic zero. If the UART detects a parity error in any received data character it

will set the ALRTPAR bit in the STATUS register.

Table 20. Data Character

Bit

Name

Symbol

Description

Start

First bit in character, always logic zero

Data0

Least significant bit of data nibble (true)

Data0/

Least significant bit of data nibble (inverted)

Data1

Data bit 1 (true)

Data1/

Data bit 1 (inverted)

Data2

Data bit 2 (true)

Data2/

Data bit 2 (inverted)

Data3

Most significant bit of data nibble (true)

Data3/

Most significant bit of data nibble (inverted)

Parity

Always logic zero (even parity)

Stop

Always logic one

Stop

Last bit in character, always logic one

E=0

Optional

Idle

Optional

Idle

Disable

Idle

Enable

Data Nibble = 0h

E=0

Optional

Idle

Optional

Idle

Disable

Idle

Enable

Data Nibble = Ah

Figure 29. Data Characters

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