參數(shù)資料
型號: M66221SP
廠商: Mitsubishi Electric Corporation
英文描述: 256 x 9-BIT MAIL-BOX
中文描述: 256 × 9位企業(yè)郵箱
文件頁數(shù): 9/11頁
文件大小: 119K
代理商: M66221SP
MITSUBISHI
DIGITAL ASSP
M66221SP/FP
256
×
9-BIT MAIL-BOX
9
Contention Read Cycle (WE = V
IH
, OE = V
IL
)
Contention read cycle No .1 (Address control) See Notes 10 and 11.
Address A = Address B
Address B
(Address A)
Address matching
Address not matching
Previous cycle data
Data output
determined
Address A
(Address B)
Not Ready B
(Not Ready A)
I/O
0
B~I/O
8
B
(I/O
0
A~I/O
8
A)
t
APS
t
NAA
t
NDA
t
v(A)
t
NO
t
a(A)
Contention read cycle No. 2 (CS control) See Notes 10 and 12.
Address matching
Not Ready B
(Not Ready A)
I/O
0
B~I/O
8
B
(I/O
0
A~I/O
8
A)
t
APS
t
NAC
CSB
(CSA)
CSA
(CSB)
Addresses
A & B
t
NDC
t
en(CS)
t
NO
t
a(CS)
Data output determined
Address A = Address B
Notes 10:
11:
12:
The Not Ready output of the first-in port holds “H”.
When CS is set to “L” before the address input is determined.
When the address input is determined before CS transition to “L”.
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