TDA8029 Datasheet, PDF (21/58 Pages) NXP Semiconductors – Low power single card reader

Philips Semiconductors
Low power single card reader
Product specification
TDA8029
handbook, full pagewidth
D0
D1
D2
D3
D4
D5
D6
D7
D8
START
bit
DATA byte
only ^STOP
in
bit
MODE 2, 3
Set FE bit if STOP bit is 0 (framing error)
SM0 to UART mode control
SM0/FE SM1
SM2
REN
TB8
RB8
TI
RI
SCON
(98h)
SMOD1 SMOD0
-
0 : SCON.7 = SM0
1 : SCON.7 = FE
POF
GF1
GF0
PD
IDL ^PCON
(87h)
MDB816
Fig.6 UART framing error detection.
handbook, full pagewidth
D0
D1
D2
D3
D4
D5
D6
D7
D8
SM0
SM1
SM2
REN
TB8
RB8
TI
1
1
1
0
1
1
X
RI
SCON
(98h)
received address D0 to D7
programmed address
COMPARATOR
MDB817
UART modes 2 or 3 and SM2 = 1: there is an interrupt if REN = 1, RB8 = 1 and received address is equal to programmed address.
When own address is received, reset SM2 to receive the data bytes. When all data bytes are received, set SM2 to wait for the next address.
Fig.7 UART multiprocessor communication, automatic address recognition.
2003 Oct 30
21