Altera USB-Blaster II - Manual (Page 15)

Chapter 2: USB-Blaster II Download Cable Specifications 2–5
JTAG Timing Constraints and Waveforms
October 2014 Altera Corporation USB-Blaster II Download Cable
User Guide
JTAG Timing Constraints and Waveforms
V
OH
5.0-V high-level output
voltage V
CC(TRGT)
= 4.5 V, I
OH
= -32 mA 3.8 — V
3.3-V high-level output
voltage V
CC(TRGT)
= 3.0 V, I
OH
= -24 mA 2.4 — V
2.5-V high-level output
voltage V
CC(TRGT)
= 2.3 V, I
OH
= -12 mA 1.9 — V
1.8-V high-level output
voltage V
CC(TRGT)
= 1.65 V, I
OH
= -8 mA 1.2 — V
1.5-V high-level output
voltage V
CC(TRGT)
= 1.4 V, I
OH
= -6 mA 1.0 — V
V
OL
5.0-V low-level output
voltage V
CC(TRGT)
= 4.5 V, I
OL
= 32 mA — 0.55 V
3.3-V low-level output
voltage V
CC(TRGT)
= 3.0 V, I
OL
= 24 mA — 0.55 V
2.5-V low-level output
voltage V
CC(TRGT)
= 2.3 V, I
OL
= 12 mA — 0.3 V
1.8-V low-level output
voltage V
CC(TRGT)
= 1.65 V, I
OL
= 8 mA — 0.45 V
1.5-V low-level output
voltage V
CC(TRGT)
= 1.4 V, I
OL
= 6 mA — 0.3 V
I
CC(TRGT)
Operating current (No
Load) V
CC(TRGT)
= 5.5 V — 316 uA
Table 2–5. USB-Blaster II Cable DC Operating Conditions (Part 2 of 2)
Symbol Parameter Conditions Min Max Unit
Figure 2–5. Timing Waveform for JTAG Signals (From Target Device Perspective)
TCK
TDO
TCK
TMS
TDI
tJCP
JT
AG
Output
JT
AG
Inputs
tJCH tJCL
tJPCO
tJPSU_TMS
tJPSU_TDI
tJPH