TDA8006 Datasheet, PDF (14/40 Pages) NXP Semiconductors – Multiprotocol IC Card coupler

Philips Semiconductors
Multiprotocol IC Card coupler
Product specification
TDA8006
Table 4 Register addresses
X = don’t care.
AD3
0
0
0
0
0
0
0
0
0
0
1
1
1
1
AD2
0
0
0
0
1
1
1
1
1
1
1
1
0
0
AD1
0
0
1
1
0
0
0
0
1
1
0
1
0
0
AD0
0
1
1
1
0
0
1
1
0
1
X
X
X
X
R/W
REGISTER
PERIPHERAL
0 CCR (Clock Configuration Register)
clock generator
0 PDR (Programmable Divider Register)
0 SOR (Synchronous Output Register) ISO 7816 UART
1 SIR (Synchronous Input Register)
0 UTR (UART Transmit Register)
1 URR (UART Receive Register)
1 USR (UART Status Register)
0 UCR (UART Configuration Register)
0 GTR (Guard Time Register)
0 PER (Ports Extension Register)
on/off sequencer
0 MAR0 (Memory Address LOW)
auxiliary RAM
0 MAR1 (Memory Address HIGH)
0 MWR (Memory Write Register)
1 MRR (Memory Read Register)
Clock circuit
The microcontroller clock (OSC), the card clock (CLK), the
ISO 7816 UART clock, and the clock to the external world
(CLKOUT), are derived from the main clock signals (XTAL
from 4 to 20 MHz, or an external clock signal applied to
XTAL1), or the internal oscillator (f_INT).
• Microcontroller clock (OSC): after power-on or reset, the
microcontroller is clocked at ¹â„₈f_INT. Then, the application
may decide to clock it at ¹â„₂f_INT, ¹â„₂f_xtal or f_xtal.
All frequency changes are synchronous, thereby
ensuring no hang-up due to short spikes etc.
• Card clock (CLK): the application may send a clock
frequency of ¹â„₂f_xtal, ¹â„₄f_xtal, ¹â„₈f_xtal or ¹â„₂f_INT (≈1.25 MHz),
or may stop the clock at HIGH or LOW. All transitions
are synchronous, ensuring correct pulse length during
start or change, in accordance with ISO 7816. After
power-on or reset, CLK is held LOW.
• External clock output (CLKOUT): CLKOUT is a
permanent clock output for external use. The following
frequencies are possible: f_xtal, ¹â„₂f_xtal and ¹â„₄f_xtal.
All transitions are synchronous. After power-on or reset,
CLKOUT is fixed at ¹â„₄f_xtal.
• ISO 7816 UART clock: the clock to the ISO 7816 UART
is identical to the clock to the card (CLK).
To achieve the different I/O baud rates as defined by
values F and D (see Table 7), the clock signal is counted
by an auto-reload 8-bit programmable counter and then
divided by a 31 or 32 prescaler.
All these configurations are controlled by the clock
configuration register and by the programmable divider
register.
2000 Feb 21
14