参数资料
型号: XR88C681P/40-F
厂商: Exar Corporation
文件页数: 39/101页
文件大小: 0K
描述: IC UART CMOS DUAL 40PDIP
标准包装: 9
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: 通孔
封装/外壳: 40-DIP(0.600",15.24mm)
供应商设备封装: 40-PDIP
包装: 管件
其它名称: 1016-1640
XR88C681P/40-F-ND
XR88C681
42
Rev. 2.11
Z-80 P can be configured to operate in one of three
different “interrupt modes”. The Z-80 is also a little bit less
complicated to interface to (than some of the P/ Cs
previously mentioned) because its address and data bus
are not multiplexed.
Figure 17 presents a schematic of
the pin out of the Z-80 P.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
A11
A12
A13
A14
A15
PHI
D4
D3
D5
D6
VCC
D2
D7
D0
D1
-INT
-NMI
-HALT
-MREQ
-IORQ
-RD
-WR
-BUSAK
-WAIT
-BUSRQ
-RESET
-M1
-RFSH
GND
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
Z80 CPU
Figure 17. Pin Out of the Z80 CPU Device
The Z-80 CPU will support Read/Write operations
between memory and I/O. The Z-80 does require some
additional glue logic in order to interface directly to
memory and peripheral devices. For instance, the Z-80
CPU device does not come with the control bus signals:
-
MEMR (Memory Read), -MEMW (Memory Write), -IOR
(I/O Port Read), -IOW (I/O Port Write) or -IACK/-INTA
(Interrupt Acknowledge) pins. Each of these functions
can be derived from the -RD, -WR, -IORQ, -MREQ and
-
M1 pins.
Figure 18 presents a schematic of the Z-80
CPU Module, which shows how once can extract the
control bus signals from these CPU control pins.
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