參數(shù)資料
型號(hào): uPD72107L
廠商: NEC Corp.
英文描述: LAP-B CONTROLLER(Link Access Procedure Balanced mode)
中文描述: 鱲- B控制器(鏈路訪問過程平衡模式)
文件頁(yè)數(shù): 7/32頁(yè)
文件大?。?/td> 182K
代理商: UPD72107L
7
μ
PD72107
SDIP
QFP
QFJ
Active
Pin No.
Pin No.
Pin No.
Level
NC
9
1, 7,
1
Use this pin open.
(No Connection)
11, 15,
5
20, 21,
35
29, 40,
41, 50,
51, 55,
61, 69,
80
IC
1
12
2
Do not connect anything to this pin.
(Internally
7
19
9
Connected)
10
23
11
UBE
54
77
58
I/O
L/H
When bus master (output)
(Upper Byte
3-state
The signal output from this pin changes according
Enable)
to the input value of the B/W pin.
Byte transfer mode (B/W = 0)
UBE is always high impedance.
Word transfer mode (B/W = 1)
Indicates that valid data is either in pins D0 to D7
or pins A16D8 to A23D15 (or both).
UBE
A0
D0 to D7
A16D8 to A23D15
0
0
0
1
×
1
0
×
1
1
×
×
When bus slave (input)
UBE pin becomes input, and indicates that valid
data is either in pins D0 to D7 or pins A16D8 to
A23D15.
UBE
A0
D0 to D7
A16D8 to A23D15
0
0
×
0
1
×
1
0
×
1
1
×
I/O
Pin Name
Function
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