TDA8029 Datasheet, PDF (39/58 Pages) NXP Semiconductors – Low power single card reader

Philips Semiconductors
Low power single card reader
Product specification
TDA8029
8.10.3.4 UART Configuration Register 1 (UCR1)
This register is used for setting the parameters of the ISO UART.
Table 61 UART configuration register 1, address 6h, read and write
BIT
7
Symbol
−
Reset value
−
6
5
4
3
2
1
0
FIP
FC
PROT
T/R
LCT
SS
CONV
0
0
0
0
0
0
0
Table 62 Description of register bits
BIT
SYMBOL
DESCRIPTION
7
−
Not used.
6
FIP
Force Inverse Parity. If FIP = 1, then the UART will NAK a correct received character,
and will transmit characters with wrong parity bit.
5
FC
Test bit. FC must be left to logic 0.
4
PROT
Protocol. If PROT = 1, then protocol type is asynchronous T = 1; if PROT = 0, the
protocol is T = 0.
3
T/R
Transmit/Receive. This bit is set by software for transmission mode. A change from
logic 0 to logic 1 will set bit TBE in register USR. T/R is automatically reset by hardware
if LCT has been used before transmitting the last character.
2
LCT
Last Character to Transmit. This bit is set by software before writing the last character
to be transmitted in register UTR. It allows automatic change to reception mode. It is
reset by hardware at the end of a successful transmission. When LCT is being reset, the
bit T/R is also reset and the ISO 7816 UART is ready for receiving a character.
1
SS
Start Session. This bit is set by software before ATR for automatic convention detection
and early answer detection. It is automatically reset by hardware at 10.5 ETU after
reception of the initial character.
0
CONV
Convention. This bit is set if the convention is direct. Bit CONV is either automatically
written by hardware according to the convention detected during ATR, or by software if
bit AUTOCONV in register UCR2 is set.
8.10.3.5 Clock Configuration Register (CCR)
This register defines the clock to the card and the clock to the ISO UART. Note that if bit CKU in the prescaler register
of the selected card (register UCR2) is set, then the ISO UART is clocked at twice the frequency to the card, which allows
to reach baud rates not foreseen in ISO 7816 norm.
Table 63 Clock configuration register, address 1h, read and write
BIT
7
Symbol
−
Reset value
−
6
5
4
3
−
SHL
CST
SC
−
0
0
0
2
1
0
AC2
AC1
AC0
0
0
0
2003 Oct 30
39