HC4GX15 Datasheet, PDF (277/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
Transceiver Port List
Table 1–2. HardCopy IV GX ALTGX Megafunction Ports (Part 6 of 14)
Port Name
Input/Output
Description
8B/10B Decoder
rx_ctrldetect
rx_errdetect
rx_disperr
Output
Output
Output
Receiver control code indicator.
Available in configurations with 8B/10B
decoder. A high level indicates that the
associated received code group is a control
(/Kx.y/) code group. A low level indicates that
the associated received code group is a data
(/Dx.y/) code group.
The width of this signal depends on the
following channel width:
Channel Width rx_ctrldetect
8
1
16
2
32
4
8B/10B code group violation or disparity error
indicator.
Available in configurations with 8B/10B
decoder. A high level indicates that a code
group violation or disparity error was detected
on the associated received code group. Use
with the rx_disperr signal to differentiate
between a code group violation and/or a
disparity error as follows:
[rx_errdetect: rx_disperr]
2’b00—no error
2’b10—code group violation
2’b11—disparity error or both
The width of this signal depends on the
following channel width:
Channel Width rx_errdetect
8
1
16
2
32
4
8B/10B disparity error indicator port.
Available in configurations with 8B/10B
decoder. A high level indicates that a disparity
error was detected on the associated received
code group. The width of this signal depends
on the following channel width:
Channel Width rx_disperr
8
1
16
2
32
4
1–13
Scope
Channel
Channel
Channel
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3