Zilog EZ80L92 Manual de usuario descargar pdf (Pagina 40)

eZ80L92 Development Kit

User Manual

Operational Description UM012913-0407

Jumper J11

The J11 jumper connection controls access to the off-chip Flash memory

device. When the shunt is placed, access to this Flash device is enabled.

See Table 16.

The silk-screened label on the eZ80Acclaim!

Development Platform for

jumper J11 is incorrect. Currently, it reads DIS_FLASH. The correct label

is EN_FLASH.

Jumper J12

The J12 jumper connection controls the selection of a 5 V or 3 VDC power

supply to the embedded modem, if an embedded modem is used. See

Table 17.

Table 16. J11—EN_FLASH (Off-Chip)*

Shunt

Status Function Affected Device

IN All access to external Flash memory on

the eZ80L92 Module is enabled.

External Flash memory on the

eZ80L92 Module.

OUT All access to external Flash memory on

the eZ80L92 Module is disabled.

External Flash memory on the

eZ80L92 Module.

Note: As shipped from the factory, external Flash memory is not installed.

Table 17. J12—Power Supply to an Embedded Modem

Shunt

Status Function Affected Device

1–2 5 V DC is provided to power the embedded

modem.

Embedded modem.

2–3 3.3 V DC is provided to power the

embedded modem.

Embedded modem.

Note:

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Zilog EZ80L92 Manual de usuario Pagina 40