参数资料
型号: ST16C554CQ64-F
厂商: Exar Corporation
文件页数: 8/39页
文件大小: 0K
描述: IC UART FIFO 16B QUAD 64LQFP
标准包装: 160
特点: *
通道数: 4,QUART
FIFO's: 16 字节
规程: RS232
电源电压: 2.97 V ~ 5.5 V
带自动流量控制功能:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
其它名称: 1016-1264
ST16C554/554D
16
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
REV. 4.0.1
4.0
INTERNAL REGISTER DESCRIPTIONS
4.1
Receive Holding Register (RHR) - Read- Only
4.2
Transmit Holding Register (THR) - Write-Only
4.3
Interrupt Enable Register (IER) - Read/Write
The Interrupt Enable Register (IER) masks the interrupts from receive data ready, transmit empty, line status
and modem status registers. These interrupts are reported in the Interrupt Status Register (ISR).
TABLE 8: INTERNAL REGISTERS DESCRIPTION.
ADDRESS
A2-A0
REG
NAME
READ/
WRITE
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
COMMENT
16C550 Compatible Registers
0 0 0
RHR
RD
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7] = 0
0 0 0
THR
WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
0 0 1
IER
RD/WR
0
Modem
Stat.
Int.
Enable
RX Line
Stat.
Int.
Enable
TX
Empty
Int
Enable
RX
Data
Int.
Enable
0 1 0
ISR
RD
FIFOs
Enabled
FIFOs
Enabled
0
INT
Source
Bit-3
INT
Source
Bit-2
INT
Source
Bit-1
INT
Source
Bit-0
0 1 0
FCR
WR
RXFIFO
Trigger
RXFIFO
Trigger
0
DMA
Mode
Enable
TX
FIFO
Reset
RX
FIFO
Reset
FIFOs
Enable
0 1 1
LCR
RD/WR
Divisor
Enable
Set TX
Break
Set
Parity
Even
Parity
Enable
Stop
Bits
Word
Length
Bit-1
Word
Length
Bit-0
1 0 0
MCR
RD/WR
0
Internal
Lopback
Enable
INT
Output
Enable
(OP2#)
Rsvd
(OP1#)
RTS#
Output
Control
DTR#
Output
Control
LCR[7] = 0
1 0 1
LSR
RD/WR
RX
FIFO
Global
Error
THR &
TSR
Empty
THR
Empty
RX Break
RX
Framing
Error
RX
Parity
Error
RX
Over-
run
Error
RX
Data
Ready
1 1 0
MSR
RD/WR
CD#
Input
RI#
Input
DSR#
Input
CTS#
Input
Delta
CD#
Delta
RI#
Delta
DSR#
Delta
CTS#
1 1 1
SPR
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Baud Rate Generator Divisor
0 0 0
DLL
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7]=1
LCR
≠0xBF
0 0 1
DLM
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
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