Transceivers
Figure 2–24. Regional Clock Resources in Arria GX Devices
CLK[15..12]
11 5
7
RCLK
RCLK
[31..28]
[27..24]
Arria GX
Transceiver
Block
RCLK
[3..0]
RCLK
[23..20]
1
2
CLK[3..0]
RCLK
[7..4]
RCLK
[19..16]
Arria GX
Transceiver
Block
RCLK
[11..8]
RCLK
[15..12]
8
12 6
CLK[7..4]
For the regional or global clock network to route into the transceiver, a
local route input output (LRIO) channel is required. Each LRIO clock
region has up to eight clock paths and each transceiver block has a
maximum of eight clock paths for connecting with LRIO clocks. These
resources are limited and determine the number of clocks that can be used
between the PLD and transceiver blocks. Tables 2–7 and 2–8 give the
number of LRIO resources available for Arria GX devices with different
number of transceiver blocks.
Table 2–7. Available Clocking Connections for Transceivers in EP1AGX35D,
EP1AGX50D, and EP1AGX60D
Clock Resource
Transceiver
Source
Regional
Clock
Bank13
8 Clock I/O
Bank14
8 Clock I/O
Global Clock
Region0
8 LRIO clock
RCLK 20-27
v
v
v
Region1
8 LRIO clock
RCLK 12-19
v
2–34
Arria GX Device Handbook, Volume 1
Altera Corporation
May 2008
ALTERA [ ALTERA CORPORATION ]
