6–28
Chapter 6: I/O Features in Cyclone IV Devices
High-Speed I/O Standards Support
March 2016
Altera Corporation
High-Speed I/O Standards Support
This section provides information about the high-speed I/O standards and the HSSI
input reference clock supported in Cyclone IV devices.
High Speed Serial Interface (HSSI) Input Reference Clock Support
Cyclone IV GX devices support the same I/O features for GPIOs with additional new
features where current I/O banks 3A and 8A consist of dual-purpose clock input pins
(
CLKIN
) and 3B and 8B consist of dedicated
CLKIN
that can be used to support the high-
speed transceiver input reference clock (
REFCLK
) features on top of the
general-purpose clock input function.
The EP4CGX15, EP4CGX22, and EP4CGX30 devices contain two pairs of
CLKIN/REFCLK
pins located in I/O banks 3A and 8A. I/O banks 3B and 8B are not
available in EP4CGX15, EP4CGX22, and EP4CGX30 devices. The EP4CGX50,
EP4CGX75, EP4CGX110, and EP4CGX150 devices have a total of four pairs of
CLKIN/REFCLK
pins located in I/O banks 3A, 3B, 8A, and 8B. I/O banks 3B and 8B can
also support single-ended clock inputs. For more information about the
CLKIN/REFCLK
pin location, refer to
and
.
Table 6–9. Cyclone IV GX I/O, Differential, and XCVRs Channel Count
Device
4CGX15
4CGX22
4CGX30
4CGX50
4CGX75
4CGX110
4CGX150
Numbers of
Differential
Channels
1
69-
FBGA
1
69-
FBGA
3
24-
FBGA
1
69-
FBGA
3
24-
FBGA
4
84-
FBGA
4
84-
FBGA
6
72-
FBGA
4
84-
FBGA
6
72-
FBGA
4
84-
FBGA
6
72-
FBGA
8
96-
FBGA
4
84-
FBGA
6
72-
FBGA
8
96-
FBGA
User I/O
72
72
150
72
150
290
290
310
290
310
270
393
475
270
393
475
User I/O
banks
9
9
9
9
11
11
,
11
11
,
11
11
,
11
,
11
11
,
11
11
,
9
9
16
9
16
45
45
51
45
51
38
52
63
38
52
63
,
16
16
48
16
48
85
85
89
85
89
82
129
157
82
129
157
XCVRs
2
2
4
2
4
4
4
8
4
8
4
8
8
4
8
8
(1) User I/O pins are used as inputs or outputs; clock input pins are used as inputs only; clock output pins are used as outputs only.
(2) For differential pad placement guidelines, refer to
(3) The I/O pin count includes all GPIOs, dedicated clock pins, and dual-purpose configuration pins. Transceivers pins and dedicated configuration pins are
not included in the pin count.
(4) Includes one configuration I/O bank and two dedicated clock input I/O banks for HSSI input reference clock.
(5) Includes one configuration I/O bank and four dedicated clock input I/O banks for HSSI input reference clock.
(6) Single-ended clock input support is available for dedicated clock input I/O banks 3B (pins
CLKIO20
and
CLKIO22
) and 8B (pins
CLKIO17
and
CLKIO19
).
(7) The true LVDS count includes all LVDS I/O pairs, differential clock input and clock output pins in right I/O banks 5 and 6.
(8) The emulated LVDS count includes all LVDS I/O pairs, differential clock input and clock output pins in column I/O banks 3, 4, 7, and 8.
(9) LVDS input and output buffers are sharing the same p and n pins. One LVDS I/O channel can only be either transmitter or receiver at a time.
Summary of Contents for Cyclone IV
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