In u'nSP IDE, user can emulate, debug and download on SPMC75X family through an
USB Probe provided by SunplusIT.
The embedded In-Circuit-Emulation has three
external pins: ICEN , ICECLK and ICESDA . In user's target board, t he USB Probe
interface circuit can be developed by the integration of the three introducing
pins and the power ( +3.3 V) lines and GND lines together.
1. Get to know USB Probe USB Probe
Probe is the interface between the ICE
embedded in SPMC75X family and the u'nSP IDE. User can emulate, debug and
download on SPMC75X family through Probe in u'nSP IDE. The connection picture is
shown as figure 1-1.
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|
| Figure 1-1 Probe and Connection |
Probe connector has three types of specification as shown below:
| Package of PS2 |
Package of SIP |
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 |
 |
Pin Descriptions
|
Pin No. |
Mnemonic |
Description |
|
1 |
+3.3V |
External power supply |
|
2 |
ICEEN |
Connect to ICE-EN pin in SPMC75X family |
|
3 |
ICECLK |
Connect to ICE-CLK pin in SPMC75X family |
|
4 |
ICESDA |
Connect to ICE-SDA pin in SPMC75X family |
|
5 |
GND |
Ground |
|
6 |
NC |
No Connection
|
2. Hardware Connection
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|
| Figure 1-2 Hardware Connection |
The Hardware Connection is shown in figure 1-2.
Insert the Probe flat end
to USB interface into PC and the other end (PS2 or SIP) into the Probe connector
in the user's target board or SPMC75X EVM board. Then supply power to the user's
target board or SPMC75X EVM board.
3. Emulation and debug
After
accomplished the hardware connection, user can emulate, debug and download on
SPMC75X family in unSP IDE, just as shown in figure 1-3.
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|
| Figure 1-3 Integrated Development Environment - unSP IDE |
4 Program
SPMC75 X family use s flash as program
memory. The program has been written to the device without the special
programming operation when performing simulation debug.
5 Interface design between user's target board and USB
probe
When user designs on SPMC75X family , ICE interface should be
reserved to e mulate, debug and download.
The interface of USB probe is
designed as: the introducing pins ICEEN, ICECLK and ICESDA from SPMC75 family
comes with the power(+3.3V)and GND to consist the interface circuit which is
connected to the probe as shown in Figure 1－4. The power supply used in USB
probe is +3.3V, while the SPMC75 family is +5V, thus a voltage regulator tube is
adopted in this circuit to convert the voltage from +5V to +3.3V supplied for
USB probe.
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|
| Figure 1－4 Probe Interface Circuit |
If user adopts the PS2 Probe, the schematic is shown in Figure 1－4 and the
corresponding PCB part package is shown in Figure 1－5; if user adopts the SIP
Probe, the schematic is same as Figure 1－4 except deleting Pin6 of PROBE and the
corresponding PCB part package is shown in Figure 1－6.
Figure 1－5 PCB part package of PS2 Probe |
Figure 1－6 PCB part package of SIP Probe |
