参数资料
型号: XR16M554IL48-F
厂商: Exar Corporation
文件页数: 6/46页
文件大小: 0K
描述: IC UART FIFO 16B QUAD 48QFN
标准包装: 260
特点: *
通道数: 4,QUART
FIFO's: 16 字节
规程: RS232
电源电压: 1.62 V ~ 3.63 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: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN-EP(7x7)
包装: 托盘
XR16M554/554D
14
1.62V TO 3.63V QUAD UART WITH 16-BYTE FIFO
REV. 1.0.0
2.9
Transmitter
The transmitter section comprises of an 8-bit Transmit Shift Register (TSR) and 16 bytes of FIFO which
includes a byte-wide Transmit Holding Register (THR). TSR shifts out every data bit with the 16X internal
sampling clock. A bit time is 16X clock periods. The transmitter sends the start-bit followed by the number of
data bits, inserts the proper parity-bit if enabled, and adds the stop-bit(s). The status of the FIFO and TSR are
reported in the Line Status Register (LSR bit-5 and bit-6).
FIGURE 6. BAUD RATE GENERATOR
TABLE 6: TYPICAL DATA RATES WITH A 14.7456 MHZ CRYSTAL OR EXTERNAL CLOCK
OUTPUT Data Rate
MCR Bit-7=0
(DEFAULT)
DIVISOR FOR 16x
Clock (Decimal)
DIVISOR FOR 16x
Clock (HEX)
DLM PROGRAM
VALUE (HEX)
DLL PROGRAM
VALUE (HEX)
DATA RATE
ERROR (%)
400
2304
900
09
00
0
2400
384
180
01
80
0
4800
192
C0
00
C0
0
9600
96
60
00
60
0
19.2k
48
30
00
30
0
38.4k
24
18
00
18
0
76.8k
12
0C
00
0C
0
153.6k
6
06
00
06
0
230.4k
4
04
00
04
0
460.8k
2
02
00
02
0
921.6k
1
01
00
01
0
XTAL1
XTAL2
Crystal
Osc /
Buffer
DLL and DLM
Registers
16 X Sampling
Rate Clock
to Transmitter
and Receiver
To Other
Channels
Programmable Baud
Rate Generator Logic
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