ep1m120 Altera Corporation, ep1m120 Datasheet - Page 8

• Manufacturer Part Number: ep1m120
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Mercury Programmable Logic Device Family Data Sheet
High-Speed
Differential
Interface
8
Mercury devices provide four dedicated clock input pins and six
dedicated fast I/O pins that globally drive register control inputs,
including clocks. These signals ensure efficient distribution of high-speed,
low-skew control signals. The control signals use dedicated routing
channels to provide short delays and low skew. The dedicated fast signals
can also be driven by internal logic, providing an ideal solution for a clock
divider or internally generated asynchronous control signal with high
fan-out. The dedicated clock and fast I/O pins on Mercury devices can
also feed logic. Dedicated clocks can also be used with the Mercury
general purpose PLLs for clock management.
Each I/O row band also provides two additional I/O pins that can drive
two row-global signals. Row-global signals can drive register control
inputs for the LAB row associated with that particular I/O row band.
The top I/O or HSDI band in Mercury devices contains dedicated
circuitry for supporting differential standards at speeds up to 1.25 Gbps.
Mercury devices have dedicated differential buffers and circuitry to
support LVDS, LVPECL, and 3.3-V PCML I/O standards. Two dedicated
high-speed PLLs (separate from the general purpose PLLs) multiply
reference clocks and drive high-speed differential serializer/deserializer
channels. In addition, clock recovery units (CRUs) at each receiver
channel enable CDR. EP1M120 devices support eight input channels,
eight output channels, and two dedicated clock inputs for feeding the
receiver and/or transmitter PLLs. EP1M350 devices support 18 input
channels, 18 output channels, and two dedicated clock inputs.
Mercury devices have optional built-in 100- termination resistors on
HSDI differential receiver data pins and the HSDI_CLK1 and HSDI_CLK2
pins.
Designers can use the HSDI circuitry for the following applications:
The HSDI band supports one of two possible modes:
Gigabit Ethernet backplanes
ATM, SONET
RapidIO
POS-PHY Level 4
Fibre Channel
SDTV
Source-synchronous mode
Clock data recovery (CDR) mode
Altera Corporation