HC4GX15 Datasheet, PDF (329/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
1–65
Receiver Channel Datapath
Figure 1–52 shows the HardCopy IV GX transmitter (PCML) to Stratix II GX receiver
(PCML) DC-coupled link.
Figure 1–52. HardCopy IV GX Transmitter (PCML) to Stratix II GX Receiver (PCML)
V_CCH = 1.4/1.5 V
HardCopy IV GX
Transmitter
Physical Medium
Physical Medium
Stratix II GX
Receiver
42.5/50/60/75-Ω
TX Termination
42.5/50/60/75-Ω
TX Termination
50/60/75-Ω
RX Termination
50/60/75-Ω
RX Termination
TX
V_CM ^{0.65 V}
R_s (1)
RX
V_CM ^{0.85 V}
Note to Figure 1–52:
(1) R_S is the parasitic resistance present in the on-chip RX termination and biasing circuitry.
Table 1–15 shows the allowed transmitter and receiver settings in a HardCopy IV GX
transmitter (PCML) to Stratix II GX receiver (PCML) DC-coupled link.
Table 1–15. Settings for a HardCopy IV GX to Stratix II GX DC-Coupled Link
Transmitter (HardCopy IV GX) Settings
Receiver (Stratix II GX) Settings
Data Rate
Differential
VCCH (1) TX VCM Termination
Data Rate
I/O
Differential
Standard RX VCM Termination
600 - 6375 Mbps 1.4/1.5 V 0.65 V 100/120/150 Ω 600 - 6375 Mbps 1.4/1.5 V 0.85 V 100/120/150 Ω
PCML
Note to Table 1–15:
(1) V_CCH = 1.5 V can support data rates from 600 Mbps to 4250 Mbps. V_CCH = 1.4 V can support data rates from 600 Mbps to 6375 Mbps.
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3