HAL855 datasheet(71/102 Pages) MICRONAS

71 / 102 page

APPLICATION NOTE

HAL8xy, HAL100x

Programmer Board

Micronas

Sept. 19, 2013; APN000046_03EN

6.3.3.

Telegram Codes

Sync Bit

Each telegram starts with the Sync bit. This logical “0” pulse defines the exact timing for

tp0.

Command Bits (COM)

The Command code contains 3 bits and is a binary number. Table 6–4 shows the avail-

able commands and the corresponding codes for the HAL855.

Command Parity Bit

(CP)

This parity bit is “1” if the number of zeros within the 3 command bits is uneven. The

parity bit is “0”, if the number of zeros is even.

Address Bits (ADR)

The Address code contains 4 bits and is a binary number. Table 6–5 shows the avail-

able addresses for the HAL855 registers.

Address Parity Bit (AP)

This parity bit is “1” if the number of zeros within the 4 address bits is uneven. The par-

ity bit is “0” if the number of zeros is even.

Data Bits (DAT)

The 14 Data bits contain the register information.

The registers use different number formats for the Data bits. These formats are

explained in Section 6.3.4

In the Write command, the last bits are valid. If, for example, the TC register (6 bits) is

written, only the last 6 bits are valid.

In the Read command, the first bits are valid. If, for example, the TC register (6 bits) is

read, only the first 6 bits are valid.

Data Parity Bit (DP)

This parity bit is “1” if the number of zeros within the binary number is even. The parity

bit is “0” if the number of zeros is uneven.

Acknowledge

After each telegram, the output answers with the Acknowledge signal. This logical “0”

pulse defines the exact timing for tpOUT.

Table 6–4:

Available commands

Command

Code

Explanation

READ

read a Setup EEPROM register (like TC, TCSQ, magnetic range, etc.)

READL

read a Characteristics EEPROM register (setpoints 0 to 15)

READH

read a Characteristics EEPROM register (setpoints 16 to 31)

WRITE

write a Setup EEPROM register (like TC, TCSQ, Magnetic range, etc.)

WRITEL

write a Characteristics EEPROM register (setpoints 0 to 15)

WRITEH

write a Characteristics EEPROM register (setpoints 16 to 31)

PROM

program all non-volatile registers

ERASE

erase all non-volatile registers

Please note: The Lock bit is set by using the WRITE command followed by a PROM.

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