tda8031hl-c107 NXP Semiconductors, tda8031hl-c107 Datasheet - Page 23

• Manufacturer Part Number: tda8031hl-c107
• Description: Usb Smart Card Reader Otp Or Rom
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 19 Description of the UCR2 bits
2003 Jul 04
handbook, full pagewidth
USB smart card reader (OTP or ROM)
BIT
27
26
25
24
23
22
21
20
AUTOCONV Auto convention: If bit AUTOCONV = 1, then the convention is set by software with bit
SYMBOL
DISTBE/
ENINT1
CKU
RBF
SAN
PSC
2
Enable Interrupt 1: If bit ENINT1 = 1, then a HIGH-to-LOW transition on INT1 will
wake-up the microcontroller from power-down mode. When not in power-down mode,
bit ENINT1 has no effect.
Disable TBE/RBF interrupts: If bit DISTBE/RBF = 1, then reception or transmission of a
character will not generate an interrupt. This feature is useful for increasing
communication speed with the card; in this case, the copy of TBE/RBF bit within the
MSR must be polled and not the original, in order not to loose priority interrupts which
can occur in the USR.
not used
not used
Synchronous/Asynchronous: Bit SAN is set by software if a synchronous card is
expected. Then, the UART is bypassed and only bit 0 in the URR and UTR is connected
to the I/O. In this case, the clock is controlled by bit SC in the CCR.
CONV in the UART Configuration Register. If it is reset, then the configuration is
automatically detected on the first received character while the bit SS (Start Session) is
set.
Clock UART: Bit CKU is used to clock the UART at twice the clock frequency of the
card. An ETU will last 31
be noted that when CKU = 1 it has no effect if f
that a baud rate of 76800 is not possible when the card is clocked with the frequency on
XTAL1.
Prescaler: If bit PSC = 1, then the prescaler value is 32. If PSC = 0, then the prescaler
value is 31. One ETU will last a number of cards clock cycles equal to PSC
baud rates specified in “ISO7816” norm are achievable with this configuration.
CKU
CLK
CLK
MUX
Fig.6 ETU generation.
PDR clock pulses if CKU = 0 and half if CKU = 1. It should
31 or 32
23
PSC
DESCRIPTION
PDR
MGU886
CLK
= f
XTAL1
TDA8030; TDA8031
ETU
. This means, for example,
Product specification
PDR. All