HC4GX15 Datasheet, PDF (328/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–64
Chapter 1: HardCopy IV GX Transceiver Architecture
Receiver Channel Datapath
Figure 1–51 shows the Stratix II GX transmitter (PCML) to HardCopy IV GX receiver
(PCML) coupled link.
Figure 1–51. Stratix II GX Transmitter (PCML) to HardCopy IV GX Receiver (PCML)
V_CCH = 1.2 V/1.5 V
Stratix II GX
Transmitter
Physical Medium
Physical Medium
HardCopy IV GX
Receiver
50/60/75-Ω
TX Termination
50/60/75-Ω
42.5/50/60/75-Ω
TX Termination RX Termination
42.5/50/60/75-Ω
RX Termination
TX
V_CM ^{0.6 V/0.7 V}
R_s (1)
RX
V_CM ^{0.82 V}
Note to Figure 1–51:
(1) R_S is the parasitic resistance present in the on-chip RX termination and biasing circuitry.
Table 1–14 shows the allowed transmitter and receiver settings in a Stratix II GX to
HardCopy IV GX DC-coupled link.
Table 1–14. Settings for a Stratix II GX to HardCopy IV GX DC-Coupled Link
Transmitter (Stratix II GX) Settings
Receiver (HardCopy IV GX) Settings
Data Rate
VCCH (1)
TX VCM (1)
Differential
Termination
Data Rate
RX VCM
Differential
Termination
600 - 6375 Mbps
1.5 V
0.6 V/0.7 V
(1.5 V PCML)
100/120/150 Ω 600 - 6375 Mbps 0.82 V
100/120/150 Ω
Note to Table 1–14:
(1) V_CCH = 1.5 V with TX Vcm = 0.7 V can support data rates from 600 Mbps to 3125 Mbps. V_CCH = 1.5 V with TX Vcm = 0.6 V can support data
rates from 600 Mbps to 6375 Mbps.
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation