Midas RTE-V821-PC, Руководство пользователя

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RTE-V821-PC USER’ S MANUAL
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The following table lists registers related to the WCU.
Register I/O address Setting
BCTC C000-0020h 0000-0001B
PWC0 C000-0022h 0000-0000B
PWC1 C000-0024h 0000-0000B
PWC2 C000-0026h xxxx-xxxxB
Wait Control Unit Setting
5.2.3. DRAM Control Unit (DRAMC)
It is necessary to set the DRAM control unit according to the capacity of the DRAM-SIMM chip
mounted on the board.
The setting listed below applies when the system clock frequency is 25 MHz and the SIMM chip
has an access time of 70 ns or less (in this case, access involves 3 wait states). Note that if the
system clock frequency is changed, it is necessary to adjust the refresh interval.
Register I/O address Setting Remark
DRC C000-0028h 1000-0110B When 4 Mbytes or 8 Mbytes of
SIMM are used
1000-0111B When 16 Mbytes or 32 Mbytes
of SIMM are used
RFC C000-002Ah 1000-1000B
DRAM Control Unit Setting
5.2.4. ROM Controller (ROMC)
Page-ROM cannot be used in the RTE-V821-PC. So, no ROM controller is used.
5.2.5. DMA Controller (DMAC)
The DMA controller is not used in the RTE-V821-PC. The CPU pins related to DMA (DREQ0,
DACK0-, DREQ1, and DACK1-) are open on the JSUBPORT connector. The TC- pin is not
used in the RTE-V821-PC either.
5.2.6. Realtime Pulse Unit (RPU)
The realtime pulse unit is not used in the RTE-V821-PC. The CPU pins related to the realtime
pulse unit (INTP00-, TO00, INTP02-, and TO01) are open on the JSUBPORT connector. The
INTP01- and INTP03- pins are not used in the RTE-V821-PC either.
5.2.7. Serial Control Unit (SCU)
The UART function is not used in the RTE-V821-PC. However, TxD is used as the UBE- pin, so
the UART transmission function is unavailable. Only the reception function is open to the user,
because RxD is not used in the RTE-V821-PC.
The SCI function is not used in the RTE-V821-PC. The SCI-related CPU pins (SI, SO, and
SCLK-) are open on the JSUBPORT connector.