CP321 datasheet(74/144 Pages) ETC2

74 / 144 page

Configuration

CP321

Page 4 - 16

ID 24977, Rev. 02

4.4

UART Registers Address Mapping

4.4.1

UART A

The following table indicate the address mapping of the UART A. For a more detailed descrip-

tion please refer to the EXAR XR16C2850 DUART manual.

Table 4-15:UART A General Register Set

READ MODE

WRITE MODE

ADDRESS

Receive Holding Register

Transmit Holding Register

0xFFE0 0000

n/a

Interrupt Enable Register

0xFFE0 0001

Interrupt Status Register

FIFO Control Register

0xFFE0 0002

n/a

Line Control Register

0xFFE0 0007

n/a

Modem Control Register

0xFFE0 0004

Line Status Register

n/a

0xFFE0 0005

Modem Status Register

n/a

0xFFE0 0006

Scratchpad Register

0xFFE0 0007

Table 4-16:UART A Baud Rate Register Set

READ MODE

WRITE MODE

ADDRESS

LSB of divisor latch

0xFFE0 0000

MSB of divisor latch

0xFFE0 0001

Table 4-17:UART A Enhanced Register Set

READ MODE

WRITE MODE

ADDRESS

Trigger Level Register

0xFFE0 0000

Feature Control Register

0xFFE0 0001

Enhanced Feature Register

0xFFE0 0002

Enhanced Mode Select Register

0xFFE0 0007

Xon-1

0xFFE0 0004

Xon-2

0xFFE0 0005

Xoff-1

0xFFE0 0006

Xoff-2

0xFFE0 0007

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