參數(shù)資料
型號(hào)： IP82C237-12
廠商： INTERSIL CORP
元件分類： DMA控制器
英文描述： CMOS High Performance Programmable DMA Controller
中文描述： 4 CHANNEL(S), 12.5 MHz, DMA CONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁(yè)數(shù)： 19/25頁(yè)
文件大?。?/td> 158K
代理商： IP82C237-12
4-166
82C237
AC Electrical Specifications
V
CC
= +5.0V
±
10%, GND = 0V, T
A
= 0
o
C to +70
o
C (C82C237),
T
A
= -40
o
C to +85
o
C (I82C237),
T
A
= -55
o
C to +125
o
C (M82C237)
SYMBOL
PARAMETER
82C237
82C237-12
UNITS
MIN
MAX
MIN
MAX
DMA (MASTER) MODE
(1)TAEL
AEN HIGH from CLK LOW (S1) Delay Time
-
105
-
50
ns
(2)TAET
AEN LOW from CLK HIGH (SI) Delay Time
-
80
-
50
ns
(3)TAFAB
ADR Active to Float Delay from CLK HIGH
-
55
-
55
ns
(4)TAFC
READ or WRITE Float Delay from CLK HIGH
-
75
-
50
ns
(5)TAFDB
DB Active to Float Delay from CLK HIGH
-
135
-
90
ns
(6)TAHR
ADR from READ HIGH Hold Time
TCY-75
-
TCY-65
-
ns
(7)TAHS
DB from ADSTB LOW Hold Time
TCL-18
-
TCL-18
-
ns
(8)TAHW
ADR from WRITE HIGH Hold Time
TCY-65
-
TCY-50
-
ns
(9)TAK
DACK Valid from CLK LOW Delay Time
-
105
-
69
ns
EOP HIGH from CLK HIGH Delay Time
-
105
-
90
ns
EOP LOW from CLK HIGH Delay Time
-
60
-
35
ns
(10)TASM
ADR Stable from CLK HIGH
-
60
-
50
ns
(11)TASS
DB to ADSTB LOW Setup Time
TCH-20
-
TCH-20
-
ns
(12)TCH
CLK HIGH Time (Transitions 10ns)
55
-
30
-
ns
(13)TCL
CLK LOW Time (Transitions 10ns)
43
-
30
-
ns
(14)TCY
CLK Cycle Time
125
-
80
-
ns
(15)TDCL
CLK HIGH to READ or WRITE LOW Delay
-
130
-
120
ns
(16)TDCTR
READ HIGH from CLK HIGH (S4) Delay Time
-
115
-
80
ns
(17)TDCTW
WRITE HIGH from CLK HIGH (S4) Delay Time
-
80
-
70
ns
(18)TDQ
HRQ Valid from CLK HIGH Delay Time
-
75
-
30
ns
(19)TEPH
EOP Hold Time from CLK LOW (S2)
90
-
50
-
ns
(20)TEPS
EOP LOW to CLK LOW Setup Time
25
-
0
-
ns
(21)TEPW
EOP Pulse Width
135
-
50
-
ns
(22)TFAAB
ADR Valid Delay from CLK HIGH
-
60
-
50
ns
(23)TFAC
READ or WRITE Active from CLK HIGH
-
90
-
50
ns
(24)TFADB
DB Valid Delay from CLK HIGH
-
60
-
45
ns
(25)THS
HLDA Valid to CLK HIGH Setup Time
45
-
10
-
ns
(26)TIDH
Input Data from MEMR HIGH Hold Time
0
-
0
-
ns
(27)TIDS
Input Data to MEMR HIGH Setup Time
90
-
45
-
ns
(28)TODH
Output Data from MEMW HIGH Hold Time
15
-
TCY-50
-
ns
(29)TODV
Output Data Valid to MEMW HIGH
TCY-35
-
TCY-10
-
ns
(30)TQS
DREQ to CLK LOW (SI, S4) Setup Time
0
-
0
-
ns
(31)TRH
CLK to READY LOW Hold Time
20
-
10
-
ns
(32)TRS
READY to CLK LOW Setup Time
35
-
15
-
ns
(33)TCLSH
ADSTB HIGH from CLK LOW Delay Time
-
70
-
70
ns
(34)TCLSL
ADSTB LOW from CLK LOW Delay Time
-
120
-
60
ns
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