參數(shù)資料
型號(hào): ST16C550IQ48TR-F
廠商: Exar Corporation
文件頁數(shù): 33/35頁
文件大?。?/td> 0K
描述: IC UART FIFO 16B SGL 48TQFP
標(biāo)準(zhǔn)包裝: 1,500
特點(diǎn): *
通道數(shù): 1,UART
FIFO's: 16 字節(jié)
電源電壓: 2.97 V ~ 5.5 V
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
ST16C550
7
Rev. 5.01
Symbol
Pin
Signal
Pin Description
40
44
48
type
SYMBOL DESCRIPTION
-CTS
36
40
38
I
Clear to Send (active low) - A logic 0 on the -CTS pin
indicates the modem or data set is ready to accept transmit
data from the ST16C550. Status can be tested by reading
MSR bit-4. This pin has no effect on the UART’s transmit or
receive operation.
-DSR
37
41
39
I
Data Set Ready (active low) - A logic 0 on this pin indicates
the modem or data set is powered-on and is ready for data
exchange with the UART. This pin has no effect on the
UART’s transmit or receive operation.
-DTR
33
37
33
O
Data Terminal Ready (active low) - A logic 0 on this pin
indicates that the ST16C550 is powered-on and ready. This
pin can be controlled via the modem control register.
Writing a logic 1 to MCR bit-0 will set the -DTR output to
logic 0, enabling the modem. This pin will be a logic 1 after
writing a logic 0 to MCR bit-0, or after a reset. This pin has
no effect on the UART’s transmit or receive operation.
-RI
39
43
41
I
Ring Indicator (active low) - A logic 0 on this pin indicates the
modem has received a ringing signal from the telephone
line. A logic 1 transition on this input pin will generate an
interrupt.
-RTS
32
36
32
O
Request to Send (active low) - A logic 0 on the -RTS pin
indicates the transmitter has data ready and waiting to send.
Writing a logic 1 in the modem control register (MCR bit-1)
will set this pin to a logic 0 indicating data is available. After
a reset this pin will be set to a logic 1. This pin has no effect
on the UART’s transmit or receive operation.
RX
10
11
7
I
Receive Data - This pin provides the serial receive data
input to the ST16C550. A logic 1 indicates no data or an idle
channel. During the local loop-back mode, the RX input pin is
disabled and TX data is internally connected to the UART RX
Input, internally, see figure 12.
TX
11
13
8
O
Transmit Data - This pin provides the serial transmit data
from the ST16C550, the TX signal will be a logic 1 during
reset, idle (no data). During the local loop-back mode, the
TX pin is set to a logic 1 and TX data is internally connected
to the UART RX Input, see figure 12.
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