參數(shù)資料
型號: XR16L651CM-F
廠商: Exar Corporation
文件頁數(shù): 55/56頁
文件大?。?/td> 0K
描述: IC UART FIFO 32B 48TQFP
標(biāo)準(zhǔn)包裝: 250
特點: *
通道數(shù): 1,UART
FIFO's: 32 字節(jié)
規(guī)程: 打印機,RS232,RS422,RS485
電源電壓: 2.25 V ~ 5.5 V
帶并行端口:
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
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: 托盤
XR16L651
á
2.25V TO 5.5V UART WITH 32-BYTE FIFO
REV. 1.3.0
8
2.0
FUNCTIONAL DESCRIPTIONS
2.1
Host Data Bus Interface
The host interface is 8 data bits wide with 3 address lines and control signals to execute bus read and write
transactions. The 651 supports 3 type of host interfaces: Intel, Motorola and PC mode. The Intel and Motorola
interfaces provide support for their respective microcontroller or processor. This facilitates the hardware design
and interconnections. The Intel bus interface is selected by connecting IM# to logic 0 and PCMODE# to logic 1.
The Intel bus interconnections are shown in Figure 3. The Motorola bus is selected with the IM# input
connected to logic 1 and PCMODE# input ties to logic 1. The Motorola bus interconnections are shown in
Figure 4. The special PC mode is selected when IM# and PCMODE# are connected to logic 0. The PC mode
interconnections are shown in Figure 5.
T
FIGURE 3. XR16L651 INTEL BUS INTERCONNECTIONS
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
IO R *
IO W *
R ESET
D0
D1
D2
D3
D4
D5
D6
D7
IO R #
IO W #
A0
A1
A2
CS 2 #
R ESET
VC C
CS 0
CS 1
AS#
IO R
IO W
IN T
RCL K
B A UDO UT #
PC M O D E #
IM #
VC C
GN D
CS #
OP 2 #
OP 1 #
DS R#
CT S #
RT S #
DT R#
RX
TX
RI#
CD#
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