
Detailed Specifications
2- 20
R e v i sio n 1 8
User I/O Naming Conventions
Due to the complex and flexible nature of the Axcelerator family’s user I/Os, a naming scheme is used to
show the details of the I/O. The naming scheme explains to which bank an I/O belongs, as well as the
Figure 2-7
I/O Bank and Dedicated Pin Layout
Figure 2-8
General Naming Schemes
PRC
PRD
Corner4
Corner3
Corner1
I/O
BANK
3
I/O
BANK
2
I/O BANK 0
I/O BANK 5
I/O BANK 1
I/O BANK 4
I/O
BANK
7
I/O
BANK
6
Corner2
AX125
GND
VCCDA
GND
VCCDA
VPUMP
GND
VCCDA
GND
VCCDA
VCOMPLG
VCOMPLH VCCPLG
VCCPLH
VCOMPLB
VCOMPLA
VCCPLB
VCCPLA
VCOMPLE
VCOMPLF VCCPLE
VCCPLF
VCOMPLD
VCOMPLC
VCCPLD
VCCPLC
GND
VCCDA
GND
VCCDA
GND
VCCDA
GND
VCCDA
GND
VCCA
GND
VCCA
GND
VCCA
GND
VCCA
GND
VCCA
GND
VCCA
GND
VCCI2
GND
VCCI1
GND
VCCI5
GND
VCCI4
GND
VCCDA
GND
VCCDA
GND
VCCDA
GND
VCCA
GND
VCCA
GND
VCCI6
GND
VCCI7
GND
VCCI3
VCCI0
PRB
PRA
TDO
TDI
TCK
TMS
TRST
LP
IOxxXBxFx
Fx refers to an
unimplemented feature
and can be ignored.
Bank I/D 0 through 7,
clockwise from IOB NW
P - Positive Pin/ N - Negative Pin
Pair number in the
bank, starting at 00,
clockwise from IOB NW
IO12PB1F1 is the positive pin of the thirteenth pair of the
first I/O bank (IOB NE). IO12PB1 combined
with IO12NB1 form a differential pair.
For those I/Os that can be employed
either as a user I/O or as a special
function, the following nomenclature
is used:
IOxxXBxFx/special_function_name
IOxxPB1Fx/xCLKx this pin can be configured as a clock
input or as a user I/O.
Examples: