Vivanco UNIVERSAL SWITCHMODE AC TO DC MAINS ADAPTERS WITH USB CHARGING FUNCTION Guide de l'utilisateur Page 75

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System Operation
© 2008 Microchip Technology Inc. DS70320B-page 71
4.1.4.3 PROGRAMMING CONNECTIONS
The SMPS AC/DC Reference Design comes pre-programmed with the control software
and does not require a programmer to be connected to the system. However, ICSP™
headers are provided on the primary and secondary side for software development and
testing.
Figure 4-6 shows the location of the primary side programming header (J2 on the
control board).
FIGURE 4-6: PRIMARY SIDE PROGRAMMING HEADER
Figure 4-7 shows the location of the secondary side programming header (J1 on the
control board).
FIGURE 4-7: SECONDARY SIDE PROGRAMMING HEADER
The secondary side ICSP header is isolated from the AC Mains, so there are no special
precautions necessary when programming the device.
Primary Side
ICSP™ Header
CAUTION
The primary side ICSP header (J2) is not isolated from the AC Mains. An isolated USB
hub must be used to connect the programmer to the computer's USB port. If the power
supply of the SMPS AC/DC Reference Design is not isolated before programming the
device, ensure that the computer is isolated or removed from the grid.
Secondary Side
ICSP™ Header
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