Altera USB-Blaster II Manual de usuario descargar pdf (Pagina 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

5.0-V high-level output

voltage

CC(TRGT)

= 4.5 V, I

= -32 mA 3.8 — V

3.3-V high-level output

voltage

CC(TRGT)

= 3.0 V, I

= -24 mA 2.4 — V

2.5-V high-level output

voltage

CC(TRGT)

= 2.3 V, I

= -12 mA 1.9 — V

1.8-V high-level output

voltage

CC(TRGT)

= 1.65 V, I

=-8mA 1.2 — V

1.5-V high-level output

voltage

CC(TRGT)

= 1.4 V, I

=-6mA 1.0 — V

5.0-V low-level output

voltage

CC(TRGT)

= 4.5 V, I

= 32 mA — 0.55 V

3.3-V low-level output

voltage

CC(TRGT)

= 3.0 V, I

= 24 mA — 0.55 V

2.5-V low-level output

voltage

CC(TRGT)

= 2.3 V, I

=12mA — 0.3 V

1.8-V low-level output

voltage

CC(TRGT)

= 1.65 V, I

=8mA — 0.45 V

1.5-V low-level output

voltage

CC(TRGT)

= 1.4 V, I

=6mA — 0.3 V

CC(TRGT)

Operating current (No

Load)

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

JTAG OutputJTAG Inputs

tJCH tJCL

tJPCO

tJPSU_TMS

tJPSU_TDI

tJPH

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 21 22

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