参数资料
型号: XR88C681J-F
厂商: Exar Corporation
文件页数: 27/101页
文件大小: 0K
描述: IC UART CMOS DUAL 44PLCC
标准包装: 27
特点: *
通道数: 2,DUART
FIFO's: 1 字节,3 字节
电源电压: 4.75 V ~ 5.25 V
带并行端口:
带CMOS:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 管件
其它名称: 1016-1329
XR88C681
31
Rev. 2.11
Figure 8 presents a schematic of the 8085 CPU Module.
X1
X2
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
D0
D1
D2
D3
D4
D5
D6
D7
1D
2D
3D
4D
5D
6D
7D
8D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
C
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
ALE
TRAP
RST 7.5
RST 6.5
RST 5.5
INTR
-INTA
A8
A9
A10
A11
A12
A13
A14
A15
-IO/M
-RD
-WR
-IOR
-MEMR
-IOW
-MEMW
Figure 8. A Schematic of the 8085 CPU Module
8085 CPU
74LS373
Figure 9 illustrates an approach to interfacing the
XR88C681 DUART to the 8085 CPU module. Note that
the XR88C681 DUART, in this case, is memory mapped
(e.g., the signals -MEMR and -MEMW of the CPU module
are connected to the -RD and -WR pins of the DUART).
However, the user could have just as easily connected the
XR88C681 device to the CPU module’s I/O port (e.g, the
signal -IOR and -IOW of the CPU module are connected
to the -RD and -WR pins of the DUART, respectively).
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