American Dynamics PMC-4U-CACI user manual Register, Offset, Function, P a g e

REGISTER	OFFSET	FUNCTION
PMC4U_UART_DATA	0X00	UART read/write data
PMC4U_UART_IEN	0X04	UART write interrupt enable
PMC4U_UART_ISTAT	0X08	UART read interrupt status
PMC4U_UART_FCNTL	0X08	UART write FIFO control
PMC4U_UART_LCNTL	0X0C UART write line control
PMC4U_UART_MCNTL	0X10	UART write modem control
PMC4U_UART_LSTAT	0X14	UART read line status
PMC4U_UART_MSTAT	0X18	UART read modem status
PMC4U_UART_SPAD	0X1C	UART read/write scratchpad
UART baud rate register defines (enabled when *LCNTL bit-7 = 1)
PMC4U_UART_DLL	0X00	UART read/write LSB divisor
PMC4U_UART_DLM	0X04	UART read/write MSB divisor
UART enhanced register offsets (enabled when *LCNTL = 0xbf)
PMC4U_UART_FTC	0X00	UART FIFO read count/write trigger level
PMC4U_UART_FEAT	0X04	UART write feature control
PMC4U_UART_ENF	0X08	UART read/write enhanced features
PMC4U_UART_XON1	0X10	UART read/write Xon-1 word
PMC4U_UART_XON2	0X14	UART read/write Xon-2 word
PMC4U_UART_XOFF1	0X18	UART read/write Xoff-1 word
PMC4U_UART_XOFF2	0X1C UART read/write Xoff-2 word
UART EMS registers (enabled when feature control bit-6 = 1)
PMC4U_UART_EMS	0X1C UART write enhanced mode select
FIGURE 3		PMC-4U UART ADDRESS MAP

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