STLC5466 datasheet(54/130 Pages) STMICROELECTRONICS

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STLC5466

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If 8 bit microprocessor the Data (TMDR Register) is taken into account by the transmitter after writing bits

8 to 15 of this register.

Transmit Monitor Address Register (after reading)

When this register is read by the microprocessor, these different bits mean:

VI.24 - Transmit Monitor Data Register

TMDR (2E)H

: Last byte

L = 1, the word (or the byte) located in the Transmit Monitor Data Register (TMDR) is the last.

L = 0, the word (or the byte) located in the Transmit Monitor Data Register (TMDR) is not the

last.

FABT

: FABT = 1, the current message is aborted by the transmitter.

TIV

: Timer interrupt is Validated

TIV = 1, Time Out alarm generates an interrupt when the timer has expired.

TIV = 0, Time Out alarm is masked.

bit15

bit8

bit7

bit0

MA2

MA1

MA0 READ

ABT

NOBT

EXE

IDLE

READ, MA0/2, G0 have same definition as already described for the write register cycle.

IDLE

: When this bit is at “1”, IDLE (all 1’s) is transmitted during the channel validation.

EXE

: EXECUTED

When this status bit is at “1”, the command written previously by the microprocessor has been

executed and a new word can be stored in the Transmit Monitor Data Register (TMDR) by the

microprocessor.

When this bit is at “0”, the command written previously by the microprocessor has not yet been

executed.

NOBT

: NUMBER OF BYTE which has been transmitted.

NOBT = 1, the first byte is transmitting.

NOB T = 0, the second byte is transmitting, the first byte has been transmitted.

: Last byte, this bit is the L bit which has been written by the microprocessor.

ABT

: ABORT

ABT=1, the remote receiver has aborted the current message.

: Time Out one millisecond

TO = 1, the remote receiver has not acknowledged the byte which has been transmitted one

millisecond ago.

bit15

bit8

bit7

bit0

M18

M17

M16

M15

M14

M13

M12

M11

M08

M07

M06

M05

M04

M03

M02

M01

After reset (FFFF)H

M08/01 : First Monitor Byte to transmit. M08 bit is transmitted first.

M18/11 : Second Monitor Byte to transmit if NOB = 0 (bit of TMAR). M18 bit is transmitted first.

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