HAL855 datasheet(24/102 Pages) MICRONAS

24 / 102 page

HAL8xy, HAL100x

APPLICATION NOTE

Programmer Board

Sept. 19, 2013; APN000046_03EN

Micronas

4.3.3.

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 4–4 shows the avail-

able commands and the corresponding codes for the HAL805, HAL815, HAL817 and

HAL1000.

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 4–5 shows the avail-

able addresses for the HAL805, HAL815, HAL817 and HAL1000 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 a different number formats for the Data bits. These formats are

explained in Section 4.3.4

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 4–4:

Available commands

Command

Code

Explanation

READ

read a register

WRITE

write a register

PROM

program all nonvolatile registers (except the lock bits)

ERASE

erase all nonvolatile registers (except the lock bits)

LOCK

lock the whole device and switch permanently to the analog-mode

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