Manual

Chapter 4 Memory Piggybacks VM62(A) / VM42(A) User’s Manual

Jumper J2: Flash Chip Size

Setting Description

1-2 4 Mbit Flash chips fitted

1-3 1 Mbit Flash chips fitted

4.2 DM601

4.2.1 Configuration

The DM601 is a memory piggyback fitted with 16MByte DRAM and either 1 or 4MByte Flash EPROM. Two

configurable jumpers are present on the board, indicating if write protection is enabled or disabled and whether 1MBit or

4MBit Flash EPROM chips are fitted.

Figure 4.2.1.1: DM601 Jumper Layout (Component Side)

432

Flash

Bank 0

Bank 1

Jumper J1: Flash Write Protection

Setting Description 1 MB Flash

(29F010)

4 MB Flash

(29F040)

Open All Flash EPROM write protected

1-2 No protection Default

1-3 Flash bank 1 write protected upper 512 kB

($40080000 -

$40100000)

upper 2 MB

($40200000 -

$40400000)

1-4 Flash bank 0 write protected lower 512 kB

($40000000 -

$40080000)

lower 2 MB

($40000000 -

$40200000)