“Leopard 2M” Nexus Emulation Board 144QFP – 100TQ

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V1.0
Adapters
“Leopard 2M” Nexus Emulation Board 144QFP – 100TQ
Ordering code
IA144P100TQ-56EL70
Target CPU package: QFP100
Original microcontroller in the QFP100 package has no Nexus port which may be a significant drawback during
the development and test process.
“Leopard 2M” Nexus Emulation Adapter is based on the SPC56EL70 microcontroller in the LQFP144 package
(emulation device), which also exposes 4-bit Nexus port. The Emulation Adapter exhibits the same behaviour to
the target as the original 100-pin microcontroller and additionally provides the Nexus port, which allows
advanced functionalities like trace, profiler and code coverage.
A 100-pin solder part, which must be ordered separately under the IA100TQ-SOLDER ordering code, is
soldered to the target (PCB) instead of populating the original microcontroller in a 100-pin QFP package. Then
the Emulation Adapter, which acts as the original microcontroller and additionally provides debug Nexus port, is
connected on top.
Contact iSYSTEM sales representative for more details on available Nexus tools.
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All 100 pins of the “emulated” target microcontroller are accessible around the 144-pin “emulation” device.
When certain target microcontroller signal needs to be inspected e.g. by an oscilloscope, below description helps
locating it.
Pin 1 marker
1
1
2
98
99
95
3 100 97 96
91 88 85
81
94 92 89 86 83
80
76
77
93 90 87 84 82
4 5 6
7 8 9
10 11 12
13
14
15 16
17 18 19
20 21 22
23 24 25
28
34 37 40 43
27
31 33 36 39 42
26 29 30
32 35 38 41
79 78
75 74
73
72
71
70
69
68 67 66
65 64 63
62 61 60
59 58
57
56
55
54
53
45 47 50
52 51
46 49
44
48
100-pin layout – emulation adapter top view
Target microcontroller SPC56EL70 – 100 LQFP pin configuration
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•
IA100TQ-SOLDER
Solder part, which is being soldered to the target.
PCB footprint size recommended by TET:
(Unit: mm)
A
B
C
16.5 1.125 17.0
D
17.0
E
2.15
K
L
19.55 19.55
When it’s meant soldering the solder part manually, it’s highly recommended prolonging the dimension E on the
outer side (e.g. for 1.5-2 mm) during the PCB design. Note that without this modification it’s very difficult to
solder the solder part manually.
IA100TQ-SOLDER dimensions
User must be familiar with the SMT (Surface Mount Technology) soldering in order to solder the IA100TQSOLDER to the PCB instead of the original microcontroller. On request, iSYSTEM can provide this service too.
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Jumper configuration
J1 and J2: clock source configuration
Jumpers J1 and J2 select clock source for the emulation device. Per default, both jumpers are set to position 1-2,
which yields clock source being used from the emulation adapter.
For the first time after receiving the emulation adapter, it is recommended that it’s tested with this setting. Once
it’s confirmed that it is operational, target clock use (J1 & J2 position 2-3) can be tested.
Note that the emulation adapter may not operate when crystal circuit is used in the target. Typical design
guideline is that a crystal should be as close as possible to the microcontroller. However, it may happen that the
target crystal may not oscillate with the emulation adapter since clock lines (XTAL, EXTAL) between the target
and the emulation device on the emulation adapter are prolonged. There should be no problem with the oscillator
being used in the target.
If an oscillator in the target is not an option and the target crystal doesn’t oscillate in conjunction with the
emulation adapter, clock from the emulation adapter must be used (J1 & J2 position 1-2). In this case, a crystal
circuit must be assembled on the emulation adapter.
Crystal circuit
Crystal circuit is located in the corner of the emulation adapter, next to the Nexus (Mictor) connector.
Per default 10pF capacitors are populated for C3 and C4 and 40MHz crystal for Q1. Note that these values are
valid for 40MHz crystal only. If different crystal is used, appropriate capacitors must be soldered (replace
original ones).
Note: It has been confirmed that some quartz crystals don’t generate sufficient clock amplitude for the
MPC564xL microcontroller operation. Freescale MPC564xL reference design uses the NX5032GA quartz and
no problems have been noticed with the emulation adapter when using this particular type.
J3: target reset configuration
Jumper J3 connects the reset line between the emulation device and the target. By default J3 is not populated.
U3: power selection
The U3 header row is used for power supply selection. Power supplies are organized in groups and the same
voltage must be supplied for each group.
Refer to the microcontroller user manual for more details which power supply designation belongs to which
power supply.
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Signal direction
Target
Target
Target
Target
Target
Target
Target
Target
Signal
VDD_HV_OSC
VDD_HV_ADR0
VDD_HV_ADR1
VDD_HV_ADV
VDD_HV_FLA
VDD_HV_PMU
VDD_HV_REG
VDD_HV_IO
NC
NC
GND
GND
GND
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
Pin
2
4
6
8
10
12
14
16
18
20
22
24
26
Signal
CVDD_HV_OSC
CVDD_HV_ADR0
CVDD_HV_ADR1
CVDD_HV_ADV
CVDD_HV_FLA
CVDD_HV_PMU
CVDD_HV_REG
CVDD_HV_IO
NC
NC
GND
GND
GND
Signal direction
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
U3 signal description
By default all jumpers are set even though only eight jumpers (connecting pins 1-2, 3-4, 5-6, 7-8, 9-10, 11-12.
13-14, 15-16) affects the configuration. When jumpers are set, target power supply coming from the target gets
connected to the microcontroller residing on the emulation adapter. If a different power source is to be used (e.g.
in case of a standalone operation), jumpers must be removed and power source must be applied to
CVDD_HV_OSC (pin 2), CVDD_HV_ ADR0 (pin 4), CVDD_HV_ADR1 (pin 6), CVDD_HV_ ADV (pin 8),
CVDD_HV_FLA (pin 10), CVDD_HV_PMU (pin 12), CVDD_HV_REG (pin 14), CVDD_HV_IO (pin 16)
and GND (pins 21-26) signals.
iSYSTEM emulation adapter power supply adapter (ordering code: IEA-PS), which can provide 3.3V or 5V
voltage, connects on top of the emulation adapter directly to the U3 header row and allows standalone usage of
the emulation adapter. This is convenient when the target is not available or it’s not adjusted for the emulation
adapter connection yet.
IEA-PS (optional emulation adapter power supply
Emulation adapter with IEA-PS
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Schematic
Disclaimer: iSYSTEM assumes no responsibility for any errors which may appear in this document, reserves the
right to change devices or specifications detailed herein at any time without notice, and does not make any
commitment to update the information herein.
 iSYSTEM. All rights reserved.
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