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MD82C55B 参数 Datasheet PDF下载

MD82C55B图片预览
型号: MD82C55B
PDF下载: 下载PDF文件 查看货源
内容描述: CMOS可编程外设接口 [CMOS Programmable Peripheral Interface]
分类和应用:
文件页数/大小: 26 页 / 236 K
品牌: HARRIS [ HARRIS CORPORATION ]
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82C55A  
o
o
AC Electrical Specifications  
V
= +5V± 10%, GND = 0V; T = -55 C to +125 C (M82C55A) (M82C55A-5);  
CC A  
o
o
T = -40 C to +85 C (I82C55A) (I82C55A-5);  
A
o
o
T = 0 C to +70 C (C82C55A) (C82C55A-5)  
A
82C55A-5  
82C55A  
TEST  
SYMBOL  
READ TIMING  
(1) tAR  
PARAMETER  
MIN  
MAX  
MIN  
MAX  
UNITS  
CONDITIONS  
Address Stable Before RD  
Address Stable After RD  
RD Pulse Width  
0
0
-
-
0
0
-
-
ns  
ns  
ns  
ns  
ns  
ns  
(2) tRA  
(3) tRR  
250  
-
-
150  
-
-
(4) tRD  
Data Valid From RD  
200  
75  
-
120  
75  
-
1
2
(5) tDF  
Data Float After RD  
10  
300  
10  
300  
(6) tRV  
Time Between RDs and/or WRs  
WRITE TIMING  
(7) tAW  
Address Stable Before WR  
Address Stable After WR  
WR Pulse Width  
0
-
-
-
-
-
0
-
-
-
-
-
ns  
ns  
ns  
ns  
ns  
(8) tWA  
20  
20  
(9) tWW  
100  
100  
30  
100  
100  
30  
(10) tDW  
(11) tWD  
OTHER TIMING  
(12) tWB  
(13) tIR  
Data Valid to WR High  
Data Valid After WR High  
WR = 1 to Output  
-
350  
-
-
350  
-
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
1
Peripheral Data Before RD  
Peripheral Data After RD  
ACK Pulse Width  
0
0
(14) tHR  
(15) tAK  
0
-
0
-
200  
-
200  
-
(16) tST  
STB Pulse Width  
100  
-
100  
-
(17) tPS  
Peripheral Data Before STB High  
Peripheral Data After STB High  
ACK = 0 to Output  
20  
-
20  
-
(18) tPH  
(19) tAD  
(20) tKD  
(21) tWOB  
(22) tAOB  
(23) tSIB  
(24) tRIB  
(25) tRIT  
(26) tSIT  
(27) tAIT  
(28) tWIT  
(29) tRES  
50  
-
50  
-
-
175  
250  
150  
150  
150  
150  
200  
150  
150  
200  
-
-
175  
250  
150  
150  
150  
150  
200  
150  
150  
200  
-
1
ACK = 1 to Output Float  
WR = 1 to OBF = 0  
20  
20  
2
-
-
1
ACK = 0 to OBF = 1  
STB = 0 to IBF = 1  
-
-
1
-
-
1
RD = 1 to IBF = 0  
-
-
1
RD = 0 to INTR = 0  
-
-
1
STB = 1 to INTR = 1  
ACK = 1 to INTR = 1  
WR = 0 to INTR = 0  
Reset Pulse Width  
-
-
1
-
-
-
-
1
1
500  
500  
1, (Note)  
NOTE: Period of initial Reset pulse after power-on must be at least 50µsec. Subsequent Reset pulses may be 500ns minimum.  
18  
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