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Page 98 12.2 HPR1V2 schematics Fig.31: HPR1V2 schematics 12.3 Technical speci fication m i n . m a x . V C C s u p p l y v o l t a g e 1 . 2 3 . 3 V V I H i n p u t p i n v o l t a g e l o g . 1 0 . 6 5 x V C C V V I L …
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12
HPR1V2
HPR1V2 is an optional accessory to the PRESTO
programmer for programming of the devices with supply
voltage and logical levels between 1.2V and 3.3V as for
example Xilinx CoolRunner-II .
The PRESTO programmer can program devices with signal
levels between 3 and 5V ± 10%, but sometimes it is
necessary to program a device with less signal levels. In
such case, the HPR1V2 level shifter have to be used. The
level shifter have to be used with external supply voltage
from application, it cannot be supplied from the
programmer.
12.1
Usage
Plug the HPR1V2 level shifter directly to the pins of the
PRESTO programmer (NOT to the programmed device
connector!). Pin2 is used as a key, so that it is not
possible to connect it a wrong way. Now, connect the
programmed device to HPR1V2 using ICSP cable.
Connection of the programmed device pins is the same as
connection of the device to the PRESTO. Common
connection diagram is below.
Fig.30: Use of HPR1V2
Important warning
The HPR1V2 pins are unidirectional, this level
shifter can be used for example with JTAG
devices, but it cannot be used with devices
that have save bidirectional signals on the
programming interface, like PIC
microcontrollers.
The HPR1V2 have to be supplied with external
supply voltage from application.
Never turn on the internal supply voltage
from the programmer, when the HPR1V2 is
connected!
Page 98
12.2
HPR1V2 schematics
Fig.31: HPR1V2 schematics
12.3
Technical specification
min.
max.
V
CC
supply voltage
1.2
3.3
V
V
IH
input pin voltage log.1
0.65xV
CC
V
V
IL
input pin voltage log.0
0.35xV
CC
V
I
OUT
output pin current
4
mA
Table14: Technical specification
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13
HPRAVR
HPRAVR is an optional accessory for PRESTO and FORTE
programmers for programming AVR microcontrollers in
applications with the ISP10PIN standard connector on the
device's side and with the ICSPCAB8 cable on the
programmer's side. The ISP10PIN connector is typically
used on boards with microcontrollers of the AVR type
such as STK500, for example.
13.1
Usage
Connect the HPRAVR adapter to the application's
connector. Make sure that pin 1 of the HPRAVR adapter is
connected to pin 1 of the ISP10PIN connector in the
application (Pin1 is marked with a red dot at HPRAVR
while it may be marked in different ways on the
connected application – see information in the
corresponding manual).
Now interconnect the adapter and FORTE with an ICSP
cable. Pin2 in the cable is used as the key. The following
picture illustrates a typical interconnection of the PRESTO
programmer with an application through the HPRAVR
adapter:
Fig.32: Use of HPRAVR
Important Warning
Pin No.1 of the HPRAVR adapter is marked
with red color. Please double check the
position of the pin No.1 in the application as
the application could be damaged if
incorrectly connected.
Fig.33: ISP10PIN, top
view
Fig.34: HPRAVR adapter diagram