REV. 5.0.2 2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO 31 MCR[3]: INT Output Enable Enable or disable INT outputs to become acti" />
參數(shù)資料
型號(hào)： ST16C654IQ100-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 25/51頁(yè)
文件大?。?/td> 0K
描述： IC UART FIFO 64B QUAD 100QFP
標(biāo)準(zhǔn)包裝： 66
特點(diǎn)： *
通道數(shù)： 4，QUART
FIFO's： 64 字節(jié)
規(guī)程： RS232
電源電壓： 2.97 V ~ 5.5 V
帶自動(dòng)流量控制功能： 是
帶IrDA 編碼器/解碼器： 是
帶故障啟動(dòng)位檢測(cè)功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類型： 表面貼裝
封裝/外殼： 100-BQFP
供應(yīng)商設(shè)備封裝： 100-QFP（14x20）
包裝： 托盤
其它名稱： 1016-1660
ST16C654IQ100-F-ND
xr
ST16C654/654D
REV. 5.0.2
2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO
31
MCR[3]: INT Output Enable
Enable or disable INT outputs to become active or in three-state. This function is associated with the INTSEL
input, see below table for details. This bit is also used to control the OP2# signal during internal loopback
mode. INTSEL pin must be set to a logic zero during 68 mode.
Logic 0 = INT (A-D) outputs disabled (three state) in the 16 mode (default). During loopback mode, it sets
OP2# internally to a logic 1.
Logic 1 = INT (A-D) outputs enabled (active) in the 16 mode. During loopback mode, it sets OP2# internally
to a logic 0.
MCR[4]: Internal Loopback Enable
Logic 0 = Disable loopback mode (default).
Logic 1 = Enable local loopback mode, see loopback section and Figure 13.
MCR[5]: Xon-Any Enable
Logic 0 = Disable Xon-Any function (for 16C550 compatibility, default).
Logic 1 = Enable Xon-Any function. In this mode, any RX character received will resume transmit operation.
The RX character will be loaded into the RX FIFO , unless the RX character is an Xon or Xoff character and
the 654 is programmed to use the Xon/Xoff flow control.
MCR[6]: Infrared Encoder/Decoder Enable
Logic 0 = Enable the standard modem receive and transmit input/output interface. (Default)
Logic 1 = Enable infrared IrDA receive and transmit inputs/outputs. The TX/RX output/input are routed to the
infrared encoder/decoder. The data input and output levels conform to the IrDA infrared interface
requirement. The RX FIFO may need to be flushed upon enable. While in this mode, the infrared TX output
will be a logic 0 during idle data conditions.
MCR[7]: Clock Prescaler Select
Logic 0 = Divide by one. The input clock from the crystal or external clock is fed directly to the Programmable
Baud Rate Generator without further modification, i.e., divide by one (default).
Logic 1 = Divide by four. The prescaler divides the input clock from the crystal or external clock by four and
feeds it to the Programmable Baud Rate Generator, hence, data rates become one forth.
4.8
Line Status Register (LSR) - Read Only
This register provides the status of data transfers between the UART and the host. If IER bit-2 is enabled, LSR
bit 1 will generate an interrupt immediately and LSR bits 2-4 will generate an interrupt when a character with an
error is in the RHR.
LSR[0]: Receive Data Ready Indicator
Logic 0 = No data in receive holding register or FIFO (default).
Logic 1 = Data has been received and is saved in the receive holding register or FIFO.
TABLE 14: INT OUTPUT MODES
INTSEL
PIN
MCR
BIT-3
INT A-D OUTPUTS IN 16 MODE
0
Three-State
0
1
Active
1
X
Active
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