dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 113
dp8344b
Manufacturer Part Number
dp8344b
Description
Biphase Communications Processor?bcp
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP8344B.pdf
(184 pages)
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5 0 Device Specifications
Note 1 All parameters are individually tested and guaranteed Interpreting this data by numerically adding two or more parameters to create a new timing
specification may lead to invalid results
Note 2 Two remote reads from instruction memory are necessary to read a 16-bit instruction word from IMEM low byte followed by high byte The timing for the
two reads are the same except that IA is incremented after the high instruction memory byte is read
SU-RRR-CO
H-RRR-X
SU-CMD-RRR
H-CMD-RRR
PD-RRR-X
PD-Xf-LCLr
PD-LCL-X
PD-Xr-LCLf
AZ-A-LCL
ZA-LCL-A
PD-LCL-IMEM
PD-IMEM-X
PD-X-IMEM
PD-LCL-IA
W-IMEM
Symbol
ID
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
RAE REM-RD Falling before CLK-OUT Rising
RAE REM-RD Rising after XACK Rising
CMD Valid before RAE REM-RD Falling
CMD Invalid after RAE REM-RD Falling
RAE REM-RD Falling to XACK Falling
XACK Falling to LCL Rising
LCL Rising to XACK Rising
XACK Rising to LCL Falling
A Disabled before LCL Rising
A Enabled after LCL Falling
LCL Rising to AD (IMEM) Valid
AD (IMEM) Valid to XACK Rising
XACK Rising to AD (IMEM) Invalid
LCL Falling to Next IA Valid (Note 2)
IMEM Valid
TABLE 5-16 Latched Read of IMEM (Note 1)
(Continued)
FIGURE 5-16 Latched Read of IMEM
Parameter
113
(n
IW
(n
(n
Formula
T
IW
IW
a
a
T
T
T
1)T
T
T
a
T
T
a
H
H
L
T
a
a
a
a
a
a
a
2)T
1)T
H
a
a
T
a
a
H
a
b
b
b
b
b
b
Min
b
b
22
26
1
0
0
10
11
18
12
23
19
5
9
Max
26
11
22
8
5
TL F 9336 – 70
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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