TDA8029HLSLASHC2 datasheet(18/58 Pages) PHILIPS

18 / 58 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Low power single card reader

TDA8029

8.2.5

TIMER/COUNTER 2 SET-UP

Except for the baud rate generator mode, the values given for T2CON do not include the setting of the TR2 bit. Therefore,

bit TR2 must be set, separately, to turn the timer on.

Table 10 Timer 2 as a timer

Notes

1. Capture/reload occurs only on timer/counter overflow.

2. Capture/reload on timer/counter overflow and a HIGH to LOW transition on T2EX, except when timer 2 is used in the

baud rate generator mode.

Table 11 Timer 2 as a counter

Notes

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 12 Serial port control register bits

MODE

T2CON

INTERNAL CONTROL(1) (HEX)

EXTERNAL CONTROL(2) (HEX)

16-bit auto-reload

Baud rate generator receive and

transmit same baud rate

Receive only

Transmit only

MODE

T2CON

INTERNAL CONTROL(1) (HEX)

EXTERNAL CONTROL(2) (HEX)

16-bit

Auto-reload

BIT

543210

Symbol

SM0/FE

SM1

SM2

REN

TB8

RB8

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