2–2
Table 2–1. ByteBlaster II V CC(TRGT) Pin Voltage Requirements
EPC4, EPC8, and EPC16 devices
EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128 devices
(Part 2 of 2)
3.3 V
3.3 V
Chapter 2: ByteBlaster II Specifications
ByteBlaster II Connections
Cable-to-Board Connection
The ByteBlaster II cable has a standard parallel printer plug that connects to the PC.
Figure 2–1 shows a block diagram of the ByteBlaster II download cable.
Figure 2–1. ByteBlaster II Block Diagram
15
14
VCC
VCC
4
2
3
4
5
8
6
10
11
13
18 to 25
GND
TRI
TRI
TRI
TRI
TRI
Series Resistors for Signal Quality
and Parallel Port Protection
(Typically 100 Ω )
1
5
8
6
9
3
7
2, 10
GND
ByteBlaster II 25-Pin Header Connection
The 25-pin male header connects to a parallel port with a standard parallel cable.
Table 2–2 identifies the plug pin names and the corresponding programming modes.
Table 2–2. ByteBlaster II 25-Pin Header Pin-Outs
(Part 1 of 2)
AS Mode
PS Mode
JTAG Mode
Pin
2
3
Signal Name
DCLK
nCONFIG
Description
Clock signal
Configuration control
Signal Name
DCLK
nCONFIG
Description
Clock signal
Configuration
Signal Name
TCK
TMS
Description
Clock signal
JTAG state
control
machine control
4
nCS
Serial configuration
No connect
No connect
device chip select
? July 2008 Altera Corporation
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