ST16C2450 Просмотр технического описания (PDF) - Exar Corporation

Номер в каталоге

Компоненты Описание

Список матч

ST16C2450

2.97V TO 5.5V DUART

Exar Corporation 

xr

REV. 4.0.1

ST16C2450

2.97V TO 5.5V DUART

3.0 UART INTERNAL REGISTERS

Each of the UART channel in the 2450 has its own set of configuration registers selected by address lines A0,

A1 and A2 with CSA# or CSB# selecting the channel. The registers are 16C450 compatible. The complete

register set is shown on Table 4 and Table 5.

TABLE 4: UART CHANNEL A AND B UART INTERNAL REGISTERS

A2,A1,A0 ADDRESSES

REGISTER

READ/WRITE

COMMENTS

16C550 COMPATIBLE REGISTERS

0 00

RHR - Receive Holding Register

THR - Transmit Holding Register

Read-only

Write-only

LCR[7] = 0

0 00

DLL - Div Latch Low Byte

Read/Write

LCR[7] = 1

0 01

DLM - Div Latch High Byte

Read/Write

LCR[7] = 1

0 01

IER - Interrupt Enable Register

Read/Write

LCR[7] = 0

0 10

ISR - Interrupt Status Register

Reserved

Read-only

Write-only

0 11

LCR - Line Control Register

Read/Write

1 00

MCR - Modem Control Register

Read/Write

1 01

LSR - Line Status Register

Reserved

Read-only

Write-only

1 10

MSR - Modem Status Register

Reserved

Read-only

Write-only

1 11

SPR - Scratch Pad Register

Read/Write

11

Share Link: