TDA8005A Datasheet, PDF (17/36 Pages) NXP Semiconductors – Low-power 3 V/5 V smart card coupler

Philips Semiconductors
Low-power (3 V/5 V) smart card coupler
Preliminary specification
TDA8005A
handbook, full pagewidth
START; T/R
SET TRANSMIT ENABLE
transmit register selected
CONVERT, CALCULATE PARITY
AND LOAD IN TRANSMIT
(1)
SHIFT REGISTER
SHIFT EVERY ETU IF TRANSMIT
ENABLE IS SET
10th bit shifted
SET I/O BUFFER IN
RECEPTION AT 10 ETU
SAMPLE I/O AT 11 ETU
RESET TRANSMIT PART AT 11 ETU
FORCE RECEPTION MODE
STOP
parity y
error
n
SET BIT BUFFER EMPTY
AT 11 ETU
SET BIT TRANSMISSION PARITY
ERROR AND BUFFER EMPTY
AT 11 ETU
(2)
y
LCT = 1
n
RESET TRANSMIT PART AND
ENABLE TRANSMIT AT 12 ETU
RESET TRANSMIT PART AND
ENABLE TRANSMIT AT 13 ETU
T/R = 0 ⁿ
y
STOP
MGL336
(1) The transmit register may be loaded just after reading from the status register.
(2) The software must reset the last character but before completion of the first received character.
Fig.7 ISO UART transmission flow chart.
1998 Mar 20
17