2–4
Chapter 2: USB-Blaster Specifications
USB-Blaster Connections
Table 2–2. USB-Blaster Female Plug Signal Names & Programming Modes
AS Mode
PS Mode
JTAG Mode
Pin
1
2
3
Signal Name
DCLK
GND
CONF_DONE
Description
Clock signal
Signal ground
Configuration done
Signal Name
DCLK
GND
CONF_DONE
Description
Clock signal
Signal ground
Configuration done
Signal Name
TCK
GND
TDO
Description
Clock signal
Signal ground
Data from device
4
VCC(TRGT) Target power supply
VCC(TRGT)
Target power
VCC(TRGT)
Target power supply
supply
5
nCONFIG
Configuration
nCONFIG
Configuration
TMS
JTAG state machine
control
control
control
6
7
nCE
DATAOUT
Cyclone chip enable
Active serial data
nSTATUS
No connect
Configuration
No connect
No connect
out
status
8
nCS
Serial configuration
No connect
No connect
device chip select
9
10
ASDI
GND
Active serial data in
Signal ground
DATA0
GND
Data to device
Signal ground
TDI
GND
Data to device
Signal ground
1
The circuit board must supply V CC(TRGT) and ground to the USB-Blaster
cable for the I/O drivers.
Circuit Board Header Connection
The circuit board's 10-pin male header, which connects to the USB-Blaster cable's
10-pin female plug, has two rows of five pins. These pins are connected to the device’s
programming or configuration pins. Figure 2–4 shows the dimensions of a typical
10-pin male header.
1
Although a 10-pin surface mount header can be used for the JTAG, AS or PS
download cable, Altera recommends using a through-hole connector because of the
repeated insertion and removal force needed.
Figure 2–4. 10-Pin Male Header Dimensions
Top View
Side View
0.100
Dimensions are shown in inches
0.100
0.025 S
? April 2009 Altera Corporation
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