dspblok™ 21469 User Manual
Page 12
Connector Recommendations & Notes
Connector Specification
All dspblok connectors are gold plated 2mm dual row headers. Male connectors are generally mounted on
the bottom side of the dspblok pc assembly. The exceptions are JH3 & JH1, which are not intended to mate
to a motherboard. Mating female connectors are included for your target pc board. The plastic base of each
male connector is 2mm. The height of the female headers is 4.3mm. This means that the inserted combined
height of the two connectors is 6.3mm or approximately ¼ inch. Standard standoffs may be used to secure
the dspblok to the target pc board. Mounting holes are 2.3mm dia. to accommodate a 2-56 or M2 screws or
standoffs.
JH1 – JTAG
This connector is mounted on the top side of the dspblok. A 2mm right angle header is used instead of the
larger ADI JTAG header. The connections on the JTAG header correspond with the connections on an ADI
JTAG header. In addition, Vd+3.3 is also available. This addition allows an active buffer circuit to be added
for JTAG chaining applications. Danville has an ADI JTAG adapter available (P/N A.08153).
The dspblok 21469+ICE omits JH1 since the debugger is on-board. If you want to use an external emulator
or the Danville dspFlash Blackfin & SHARC Programmer, you may remove the ADI Debugger and use the
JTAG connection provided below the debugger.
JH2 – DAI, DPI, IO
This connector is mounted on the bottom side of the dspblok. The DAI lines are all uncommitted by the
dspblok. With the exception of the SPI lines, the DPI can be freely assigned. The alternate names in the table
are dspstak I/O conventions. If you are using a dspstak for development, it may be prudent to following these
usage conventions.
JH3 – Configuration
This connector is mounted on the top side of the dspblok. It provides direct access to the ADSP-21469 clock
mode and boot mode configuration pins. In most cases, you should leave all the connections open. Use
shorting jumpers if you want to change the configuration. Note that each shorting jumper will cause the
corresponding mode pin to deviate from the pin state of the default configuration. This means that some pins
are pulled high and others low.
JH4 – Power & Clock
This connector is mounted on the bottom side of the dspblok. This is the main power feed to the dspblok,
Vdd is the input to the core switching supply. Both Vdd pins should be connected to together and fed with
either 5V or 3.3V. Likewise, Vd+3.3 should be connected together and fed with 3.3V. Vd+1.1 is current
limited by a large resistor. Its purpose is for diagnostics.
