ADSP-21062/ADSP-21062L
TARGET BOARD CONNECTOR FOR EZ-ICE PROBE
The ADSP-2106x EZ-ICE Emulator uses the IEEE 1149.1
JTAG test access port of the ADSP-2106x to monitor and
control the target board processor during emulation. The EZ-
ICE probe requires the ADSP-2106x’s CLKIN, TMS, TCK,
TRST,
TDI, TDO,
EMU,
and GND signals be made acces-
sible on the target system via a 14-pin connector (a 2 row
×
7
pin strip header) such as that shown in Figure 5. The EZ-ICE
probe plugs directly onto this connector for chip-on-board
emulation. You must add this connector to your target board
design if you intend to use the ADSP-2106x EZ-ICE. The total
trace length between the EZ-ICE connector and the furthest
device sharing the EZ-ICE JTAG pin should be limited to 15
inches maximum for guaranteed operation. This length restric-
tion must include EZ-ICE JTAG signals that are routed to one
or more ADSP-2106x devices, or a combination of ADSP-
2106x devices and other JTAG devices on the chain.
1
GND
3
KEY (NO PIN)
5
BTMS
7
BTCK
9
BTRST
11
BTDI
13
GND
TOP VIEW
14
TDO
9
12
TDI
10
TRST
8
TCK
6
TMS
4
CLKIN (OPTIONAL)
2
EMU
The 14-pin, 2-row pin strip header is keyed at the Pin 3 location —
Pin 3 must be removed from the header. The pins must be
0.025 inch square and at least 0.20 inch in length. Pin spacing
should be 0.1
×
0.1 inches. Pin strip headers are available from
vendors such as 3M, McKenzie, and Samtec.
The BTMS, BTCK,
BTRST,
and BTDI signals are provided so
that the test access port can also be used for board-level testing.
When the connector is not being used for emulation, place
jumpers between the BXXX pins and the XXX pins as shown in
Figure 5. If you are not going to use the test access port for
board testing, tie
BTRST
to GND and tie or pull up BTCK to
VDD. The
TRST
pin must be asserted after power-up (through
BTRST
on the connector) or held low for proper operation of
the ADSP-2106x. None of the BXXX pins (Pins 5, 7, 9, 11) are
connected on the EZ-ICE probe.
The JTAG signals are terminated on the EZ-ICE probe as follows:
Signal
TMS
TCK
Termination
Driven through 22
Ω
Resistor (16 mA Driver)
Driven at 10 MHz through 22
Ω
Resistor (16 mA
Driver)
TRST*
Active Low Driven through 22
Ω
Resistor (16 mA
Driver) (Pulled Up by On-Chip 20 kΩ Resistor)
TDI
Driven by 22
Ω
Resistor (16 mA Driver)
TDO
One TTL Load, Split Termination (160/220)
CLKIN One TTL Load, Split Termination (160/220)
EMU
Active Low 4.7 kΩ Pull-Up Resistor, One TTL Load
(Open-Drain Output from the DSP)
*TRST is driven low until the EZ-ICE probe is turned on by the emulator at
software start-up. After software start-up,
TRST
is driven high.
Figure 5. Target Board Connector For ADSP-2106x
EZ-ICE Emulator (Jumpers in Place)
ADSP-2106x
#1
TDI
EZ-ICE
JTAG
CONNECTOR
OTHER
JTAG
CONTROLLER
TCK
TMS
EMU
TRST
TDO
CLKIN
OPTIONAL
TDI
TMS
TCK
JTAG
DEVICE
(OPTIONAL)
TDI
TMS
TCK
ADSP-2106x
n
TDI
EMU
EMU
TMS
TCK
TDO
TRST
EMU
EMU
TDO
TRST
TDO
TRST
Figure 6. JTAG Scan Path Connections for Multiple ADSP-2106x Systems
REV. C
–11–
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