LCE-780308-EM Renesas Electronics America, LCE-780308-EM Datasheet - Page 15

• Manufacturer Part Number: LCE-780308-EM
• Description: BOARD EMULATOR 78K0 UPD780308
• Manufacturer: Renesas Electronics America

Specifications of LCE-780308-EM

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.6.2. JP2 AVREF0 Jumper Options
JP2 is a three-position jumper, arranged in a T-shape, for AVREF0. It allows AVREF0
on the peripheral emulator to be connected to AVREF0 on the probe (default), to ground,
or to the AVDD pin on the peripheral emulator (which may be AVDD or VDD, as
selected with JP1).
For the uPD78064 and uPD780308 subseries, AVREF0 is equivalent to the AVREF pin.
If it is desired to connect AVREF to VDD for these devices, connect JP1 so that AVDD
is connected to VDD.
JP2 Setting
JP2-2 to JP2-1
JP2-2 to JP2-3
JP2-2 to JP2-4 *
* factory setting
2.6.3. JP3 AVREF1 Jumper Options
JP3 is a three-position jumper, arranged in a T-shape, for AVREF1. It allows AVREF1
on the peripheral emulator to be connected to AVREF1 on the probe (default), to ground,
or to the AVDD pin on the peripheral emulator (which may be AVDD or VDD, as
selected with JP1). AVDD is used only for the uPD78054 and uPD780058 subseries; for
the uPD78064 or uPD780308 subseries, AVREF1 should be jumpered to either GND or
VDD (selected for AVDD with JP1).
JP3 Setting
JP3-2 to JP3-1
JP3-2 to JP3-3
JP3-2 to JP3-4 *
* factory setting
2.6.4. JP6 AVSS Jumper Options
JP6 is a two-pin jumper for AVSS. AVSS on the peripheral emulator is always
connected to AVSS on the probe. When JP6 is inserted (default), AVSS is connected to
ground, providing a closer ground reference for AVSS. For normal design, AVSS would
always be connected to the ground, or VSS, pins of the target device.
Removing JP6 will disconnect AVSS from ground on the LCE-780308. In this case,
AVSS in the target system should be connected to target ground.
Table 2.6-2 JP2 Settings for AVREF0
Table 2.6-3 JP2 Settings for AVREF1
AVREF0 Connection
AVDD as selected by JP1
GND
AVREF0 on probe
AVREF1 Connection
AVDD as selected by JP1
GND
AVREF1 on probe
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