
Philips Semiconductors
Preliminary specification
XA-H3
CMOS 16-bit highly integrated microcontroller
1999 Sep 24
12
Table 3. Memory Mapped Registers (MMR)
MMR Name
Read/Write or
Read Only
Size
Address
Offset
Description
Reset
Value
UART0 Registers
UART0 Write Register 0
R/W
8
800h
Command register
00h
UART0 Write Register 1
R/W
8
802h
Tx/Rx Interrupt & data transfer mode
xx
UART0 Write Register 2
R/W
8
804h
Extended Features Control
xx
UART0 Write Register 3
R/W
8
806h
Receive Parameter and Control
00h
UART0 Write Register 4
R/W
8
808h
Tx/Rx miscellaneous parameters & mode
00h
UART0 Write Register 5
R/W
8
80Ah
Tx parameter and control
00h
Reserved – do not write
8
80Ch
Reserved – do not write
00h
Reserved – do not write
8
80Eh
Reserved – do not write
xx
UART0 Write Register 8
R/W
8
810h
Transmit Data Buffer
xx
UART0 Write Register 9
R/W
8
812h
Master Interrupt control
xx
UART0 Write Register 10
R/W
8
814h
Miscellaneous Tx/Rx control register
00h
UART0 Write Register 11
R/W
8
816h
Clock Mode Control
xx
UART0 Write Register 12
R/W
8
818h
Lower Byte of Baud rate time constant
00h
UART0 Write Register 13
R/W
8
81Ah
Upper Byte of Baud rate time constant
00h
UART0 Write Register 14
R/W
8
81Ch
Miscellaneous Control bits
xx
UART0 Write Register 15
R/W
8
81Eh
External / Status interrupt control
f8h
Reserved – do not write
8
828h
Reserved – do not write
00h
Reserved – do not write
8
82Ah
Reserved – do not write
00h
UART0 Read Register 0
RO
8
820h
Tx/Rx buffer and external status
UART0 Read Register 1
RO
8
822h
Receive condition status
Reserved – do not write
824h
–
UART0 Read Register 3
RO
8
826h
Interrupt Pending Bits
Reserved – do not write
8
82Ch
Reserved – do not write
Reserved – do not write
8
82Eh
Reserved – do not write
UART0 Read Register 8
RO
8
830h
Receive Buffer
Reserved – do not write
832h
UART0 Read Register 10
RO
8
834h
Clock status
Reserved – do not write
836-83Eh
–
UART1 Registers
UART1 Write Register 0
R/W
8
840h
Command register
00h
UART1 Write Register 1
R/W
8
842h
Tx/Rx Interrupt & data transfer mode
xx
UART1 Write Register 2
R/W
8
844h
Extended Features Control
xx
UART1 Write Register 3
R/W
8
846h
Receive Parameter and Control
00h
UART1 Write Register 4
R/W
8
848h
Tx/Rx miscellaneous parameters & mode
00h
UART1 Write Register 5
R/W
8
84Ah
Tx. parameter and control
00h
Reserved – do not write
8
84Ch
Reserved – do not write
00h
Reserved – do not write
8
84Eh
Reserved – do not write
xx
UART1 Write Register 8
R/W
8
850h
Transmit Data Buffer
xx
UART1 Write Register 9
R/W
8
852h
Master Interrupt control
xx
UART1 Write Register 10
R/W
8
854h
Miscellaneous Tx/Rx control register
00h
UART1 Write Register 11
R/W
8
856h
Clock Mode Control
xx
UART1 Write Register 12
R/W
8
858h
Lower Byte of Baud rate time constant
00h
UART1 Write Register 13
R/W
8
85Ah
Upper Byte of Baud rate time constant
00h