Dynamic Engineering PMC-4U-CACI User Manual download pdf (Page 19)

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PMC4U_SCC_A_CNTL

[0X18] PMC-4U SCC Channel A Control Register read/write

This address is used to access all of the channel A registers. In order to

access a register other than this base register, the register number is first

written to this address. A subsequent read or write will read from or write

to the desired register. After this process is completed, the pointers are

reset so that the base register is once again accessed. See the Z85C30

documentation for more information on this process.

PMC4U_SCC_A_DATA

[0X1C] PMC-4U SCC Channel A Data Register read/write

This address is used to access the channel A data buffers. A write to this

address loads a byte into the channel A transmit buffer, a read removes a

byte from the receive buffer.

PMC4U_SCC_B_CNTL

[0X20] PMC-4U SCC Channel B Control Register read/write

This address is used to access all of the channel B registers. In order to

access a register other than this base register, the register number is first

written to this address. A subsequent read or write will read from or write

to the desired register. After this process is completed, the pointers are

reset so that the base register is once again accessed. See the Z85C30

documentation for more information on this process.

PMC4U_SCC_B_DATA

[0X24] PMC-4U SCC Channel B Data Register read/write

This address is used to access the channel B data buffers. A write to this

address loads a byte into the channel B transmit buffer, a read removes a

byte from the receive buffer.

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Dynamic Engineering PMC-4U-CACI User Manual Page 19