Phytec phyCORE-LPC2292/94, Hardware Manual

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phyCORE-LPC2292/94
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PHYTEC Messtechnik GmbH 2006 L-658e_5
3.10 J400, J401 SRAM Configuration
Jumpers J400 and J401 are required for configuring the SRAM signals
/BLS0 through /BLS3. This configures the controller access to the
various SRAM types that can be populated on the
phyCORE-LPC2292/94, since these can have various data bus
configurations.
The following configurations are possible:
Signal Configuration J400 J401
/BLS0 and /BLS1 signals configured for
accessing fast SRAMs,
/BLS2 and /BLS3 signals configured for
accessing fast SRAMs (i.e. 10 ns)
1 + 2*
3 + 4*
1 + 2*
3 + 4*
/BLS0 and /BLS1 signals configured for
accessing standard SRAMs
/BLS2 and /BLS3 signals configured for
accessing standard SRAMs (i.e. 55 ns)
1 + 3
2 + 4
1 + 3
2 + 4
* = Default setting
Table 12: J400, J401 SRAM Access Configuration
3.11 J402 SRAM Supply Voltage
The SRAMs (U400-U403) can operate with or without a battery
buffer. Jumper J402 is used to set the supply voltage for the SRAM.
The following configurations are possible:
SRAM U400-U403 Supply Voltage J402
VCCRAM derived from VDD_V3V3 1 + 2*
VCCRAM derived from VBAT 2 + 3
* = Default setting
Table 13 J402 SRAM Supply Voltage Configuration