AT83C5127XXX-PURIM ATMEL [ATMEL Corporation], AT83C5127XXX-PURIM Datasheet - Page 5

• Manufacturer Part Number: AT83C5127XXX-PURIM
• Description: MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES
• Manufacturer: ATMEL [ATMEL Corporation]

7519A–SCR–04/05
Table 1. Pin Description (Continued)
XTAL1
XTAL2
AVCC
CVCC
DVCC
CVSS
V
AVSS
PLLF
Port
VCC
VSS
D+
D-
REF
LI
29
28
30
14
15
26
27
12
10
25
11
9
1
8
29
28
30
14
15
26
27
12
10
11
25
9
1
8
Internal
Supply
Power
DVCC
DVCC
AVCC
AVCC
VCC
VCC
ESD
PWR
PWR
PWR
PWR
PWR
GND
GND
GND
I/O
I/O
I/O
O
O
O
I
Reset
Level
USB Positive Data Upstream Port
This pin requires an external serial resistor of 33Ω and a 1.5 K
up to
USB Negative Data Upstream Port
This pin requires an external serial resistor of 33Ω
USB Voltage Reference: 3.0 <
V
voltage is controlled by software.
Input to the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal or an external oscillator must be
connected to this pin.
Output of the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal circuit must be connected to
this pin. If an external oscillator is used, leave XTAL2 unconnected.
PLL Low Pass Filter input
Receives the RC network of the PLL low pass filter.
Analog Supply Voltage
AVCC is used to supply the internal 3.3V analog regulator which
supplies the internal USB driver
Supply Voltage
VCC is used to supply the internal 3.3V digital regulator which
supplies the PLL, CPU core and internal I/O’s
DC/DC Input
LI supplies the current for the charge pump of the DC/DC converter.
- LI tied directly to VCC : the DC/DC converter must be configured in
regulator mode.
- LI tied to VCC through an external 10µH coil : the DC/DC converter
can be configured either in regulator or in pump mode.
Card Supply Voltage
CVCC is the ouput of internal DC/DC converter which supplies the
Smart Card Interface. It must be connected to an external decoupling
capacitor of 10 µF with the lowest ESR as this parameter influences
on the CVCC noise
Digital Supply Voltage
DVCC is the output of the internal analog 3.3V regulator which
supplies the USB driver. This pin must be connected to an external
680nF decoupling capacitor if the USB interface is used.
DC/DC Ground
CVSS is used to sink high shunt currents from the external coil
Digital Ground
VSS is used to supply the PLL, buffer ring and the digital core
Analog Ground
AVSS is used to supply the USB driver.
REF
Alt
V
can be connected to D+ through a 1.5 K
REF for full speed configuration.
Config
Reset
Conf 1
V
REF < 3.6 V
Conf 2
Ω
resistor. The
Conf 3
AT83C5127
V
Ω
Led
REF
pull-
5