TDA8029 Datasheet, PDF (17/59 Pages) NXP Semiconductors – Low power single card reader

Philips Semiconductors
TDA8029
Low power single card reader
Table 13: Timer 2 as a timer
Mode
16-bit auto-reload
Baud rate generator receive and
transmit same baud rate
Receive only
Transmit only
T2CON
Internal control (hex) ^[1]
00
34
External control (hex) ^[2]
08
36
24
26
14
16
[1] Capture/reload occurs only on timer/counter overflow.
[2] Capture/reload on timer/counter overflow and a 1-to-0 transition on T2EX (P1.1) pin except when timer 2 is
used in the baud rate generator mode.
Table 14: Timer 2 as a counter
Mode
16-bit
Auto-reload
T2MOD
Internal control (hex) ^[1]
02
03
External control (hex) ^[2]
04
0B
[1] Capture/reload occurs only on timer/counter overflow.
[2] Capture/reload on timer/counter overflow and a HIGH-to-LOW transition on T2EX (P1.1) pin except when
timer 2 is used in the baud rate generator mode.
8.3 Enhanced UART
The UART operates in all of the usual modes that are described in the first section of
“Data Handbook IC20, 80C51-based 8-bit microcontrollers”. In addition the UART can
perform framing error detection by looking for missing stop bits and automatic address
recognition. The UART also fully supports multiprocessor communication as does the
standard 80C51 UART.
When used for framing error detection the UART looks for missing stop bits in the
communication. A missing bit will set the bit FE or bit 7 in the SCON register. Bit FE is
shared with bit SM0. The function of SCON bit 7 is determined by bit 6 in register PCON
(bit SMOD0). If SMOD0 is set then bit 7 of register SCON functions as FE and as SM0
when SMOD0 is cleared. When used as FE this bit can only be cleared by software.
8.3.1 Serial port control register (SCON)
Table 15: SCON - serial port control register (address 98h) bit allocation
7
6
5
4
3
2
1
0
SM0/FE
SM1
SM2
REN
TB8
RB8
TI
RI
9397 750 14145
Product data sheet
Rev. 03 — 22 February 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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