American Dynamics PMC-4U-CACI - Manual (Page 19)

Hardware and Software Design • Manufacturing Services
P a g e 19
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.