EP4CE30F29C7N Datasheet, PDF (308/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

1–28
Chapter 1: Cyclone IV Transceivers Architecture
Transceiver Clocking Architecture
Figure 1–26. PLL Input Reference Clocks in Transceiver Operation for F484 and Larger Packages
(1)_, (2)_, (3)
REFCLK[5..4]
REFCLK3
MPLL_8
Transceiver
Block
GXBL1
MPLL_7
MPLL_6
Transceiver
Block
GXBL0
MPLL_5
GPLL_2
Not applicable in
F484 package
GPLL_1
REFCLK[1..0]
REFCLK2
Notes to Figure 1–26:
(1) The REFCLK2 and REFCLK3 pins are dual-purpose CLKIO, REFCLK, or DIFFCLK pins that reside in banks 3A and 8A
respectively.
(2) The REFCLK[1..0] and REFCLK[5..4] pins are dual-purpose differential REFCLK or DIFFCLK pins that reside in
banks 3B and 8B respectively. These clock input pins do not have access to the clock control blocks and GCLK
networks. For more details, refer to the Clock Networks and PLLs in Cyclone IV Devices chapter.
(3) Using any clock input pins other than the designated REFCLK pins as shown here to drive the MPLLs and GPLLs may
have reduced jitter performance.
The input reference clocks reside in banks 3A, 3B, 8A, and 8B have dedicated
V_{CC_CLKIN3A}, V_{CC_CLKIN3B}, V_{CC_CLKIN8A}, and V_{CC_CLKIN8B} power supplies separately in
their respective I/O banks to avoid the different power level requirements in the same
bank for general purpose I/Os (GPIOs). Table 1–6 lists the supported I/O standard
for the REFCLK pins.
Table 1–6. REFCLK I/O Standard Support
I/O Standard
HSSI
Protocol
Coupling
Terminatio
n
LVDS
ALL _Differential Off-chip
LVPECL
ALL ^{AC (Needs} Off-chip
1.2 V, 1.5 V,
3.3 V PCML
ALL
ALL
off-chip
resistor to
restore
Off-chip
Off-chip
ALL
V_CM)
Off-chip
HCSL
PCIe
Differential
DC
Off-chip
VCC_CLKIN Level
I/O Pin Type
Input
2.5 V
2.5 V
2.5 V
2.5 V
2.5 V
Output
Not Supported
Not Supported
Not Supported
Not Supported
Not Supported
Column I/O Row I/O
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Supported
Banks
3A, 3B, 8A, 8B
3A, 3B, 8A, 8B
3A, 3B, 8A, 8B
3A, 3B, 8A, 8B
3A, 3B, 8A, 8B
2.5 V Not Supported
Yes
No 3A, 3B, 8A, 8B
Cyclone IV Device Handbook,
Volume 2
October 2013 Altera Corporation