at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 5

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

3. Signal Description
Table 3-1.
6384B–ATARM–15-Dec-08
Signal Name
VDDIOM
VDDIOP
VDDBU
VDDANA
VDDPLL
VDDOSC
VDDCORE
VDDUSB
GND
GNDANA
GNDBU
GNDUSB
GNDPLL
XIN
XOUT
XIN32
XOUT32
OSCSEL
PCK0 - PCK1
SHDN
WKUP
NTRST
TCK
TDI
TDO
TMS
JTAGSEL
RTCK
Signal Description List (Continued)
Function
EBI I/O Lines Power Supply
Peripherals I/O Lines Power Supply
Backup I/O Lines Power Supply
Analog Power Supply
PLL Power Supply
Oscillator Power Supply
Core Chip Power Supply
USB Power Supply
Ground
Analog Ground
Backup Ground
USB Ground
PLL Ground
Main Oscillator Input
Main Oscillator Output
Slow Clock Oscillator Input
Slow Clock Oscillator Output
Slow Clock Oscillator Selection
Programmable Clock Output
Shutdown Control
Wake-up Input
Test Reset Signal
Test Clock
Test Data In
Test Data Out
Test Mode Select
JTAG Selection
Return Test Clock
Clocks, Oscillators and PLLs
Shutdown, Wakeup Logic
Power Supplies
ICE and JTAG
Ground
Ground
Ground
Ground
Ground
Output
Output
Output
Output
Output
Output
AT91SAM9G20 Preliminary
Power
Power
Power
Power
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Active
Level
Low
Comments
1.65V to 1.95V or 3.0V to 3.6V
0.9V to 1.1V
3.0V to 3.6V
0.9V to 1.1V
1.65V to 3.6V
0.9V to 1.1V
1.65V to 3.6V
Accepts between 0V and
VDDBU.
Accepts between 0V and
VDDBU.
Pull-up resistor
No pull-up resistor
No pull-up resistor
No pull-up resistor
Pull-down resistor. Accepts
between 0V and VDDBU.
1.65V to 3.6V
5