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参数资料
| 型号： | 935261430557 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | PLASTIC, QFP-64 |
| 文件页数： | 3/43页 |
| 文件大小： | 206K |
| 代理商： | 935261430557 |
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2000 Feb 21
11
Philips Semiconductors
Product specication
Multiprotocol IC Card coupler
TDA8006
Table 3
Other register byte addresses
Supply
The circuit operates within a supply voltage range of
4.2 to 6 V. The supply pins are VDD, VDDA, GND, AGND,
VDDRAM and GNDRAM. Pins VDDA and AGND supply the
card analog drivers and have to be externally decoupled
because of the large current spikes that the card and the
step-up converter can create. VDDRAM and GNDRAM
supply the auxiliary RAM and should be decoupled
separately. VDD and GND supply the rest of the chip.
An integrated spike killer ensures the contacts to the card
remain inactive during power-up or power-down.
An internally generated voltage reference is used by the
step-up converter, the voltage supervisor and the VCC
generator.
If VDD is too low to ensure proper operation, the voltage
supervisor generates an alarm pulse, whose length is
defined by an external capacitor tied to the CDELAY pin,
(1 ms per 1 nF typical). This pulse is used to reset the
controller and is used in parallel with an external reset
input which can come from the system controller. It is also
used to either block any spurious on-card contacts during
a controller reset or to force an automatic deactivation of
the contacts in the event of supply drop-out (see
Sections “Activation sequence” and “Deactivation
sequence”). It is also fed to an external open-drain output
(called ALARM) which can be chosen active HIGH or LOW
by mask option (see Table 12).
Step-up converter
Except for the VCC generator and the other card contact
buffers, the whole circuit is powered by VDD, VDDA and
VDDRAM. If the supply voltage is 4.2 V, then a higher
voltage is needed for the supply to the ISO contacts. When
a card session is requested by the controller, the
sequencer first starts the step-up converter. This uses
switched capacitors which are clocked at a frequency of
approximately 2.5 MHz by an internal oscillator.
The output voltage VUP is regulated at approximately 6 V
and then fed to the VCC generator. VCC and GND are used
as a reference for all other card contacts.
REGISTER
BYTE
ADDRESS
(HEX)
BIT RESET
VALUE
SP
81
0000 0111
DPL
82
0000 0000
DPH
83
0000 0000
PCON
87
0000 0000
TMOD
89
0000 0000
TL0
8A
0000 0000
TL1
8B
0000 0000
TH0
8C
0000 0000
TH1
8D
0000 0000
S0BUF
99
XXXX XXXX
RCAP2L
CA
0000 0000
RCAP2H
CB
0000 0000
TL2
CC
0000 0000
TH2
CD
0000 0000
handbook, full pagewidth
MGR228
Vth(VDD)
VDD
Vth(CDELAY)
CDELAY
ALARM
tW
Fig.4 Voltage supervisor.
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