This document provides a device modeling report for a Toshiba TC74VHC244F octal bus buffer integrated circuit. It includes:
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- SPICE model of the IC with subcircuits for internal gates and I/O ports
- Truth table and simulation results verifying functionality
- Measurement and simulation results for key parameters like input/output voltage levels and propagation delays
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Whatsapp: 86 18566294218
Skype: panoxshawn@outlook.com
Email: shawn.lee@panoxdisplay.com
OLED/LCD supplier: www.panoxdisplay.com
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Compared to x86, ARM shellcode has made little progress. The x86 hardware is largely homogenous. ARM, however, has several versions and variants across devices today. There are several constraints and subtleties involved in writing production quality ARM shellcode which works on modern ARM hardware, not just on QEMU emulators.
In this talk, we shall explore issues such as overcoming cache coherency, reliable polymorphic shellcode, ARM egghunting and last but not the least, polyglot ARM shellcode. A bonus side effect of this talk will be creating headaches for those who like to defend agaisnt attacks using age old signature based techniques
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This document describes 1.2cm(0.47”) active-matrix color LCD panel module EP047M800T. This liquid crystal panel module has integrated poly-silicon drivers and adopts stripe pixel arrays with 800xRGBx600, which allows SVGA images to be reproduced for EVF or other applications.
Whatsapp: 86 18566294218
Skype: panoxshawn@outlook.com
Email: shawn.lee@panoxdisplay.com
OLED/LCD supplier: www.panoxdisplay.com
Slides from my presentation on ARM Shellcode at #44CON 2018, London.
In this talk, we explore ARM egghunting and "Quantum Leap" code - polyglot ARM shellcode. A bonus side effect of this talk will be creating headaches for those who like to defend agaisnt attacks using age old signature based techniques.
HackLU 2018 Make ARM Shellcode Great AgainSaumil Shah
Compared to x86, ARM shellcode has made little progress. The x86 hardware is largely homogenous. ARM, however, has several versions and variants across devices today. There are several constraints and subtleties involved in writing production quality ARM shellcode which works on modern ARM hardware, not just on QEMU emulators.
In this talk, we shall explore issues such as overcoming cache coherency, reliable polymorphic shellcode, ARM egghunting and last but not the least, polyglot ARM shellcode. A bonus side effect of this talk will be creating headaches for those who like to defend agaisnt attacks using age old signature based techniques.
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Compared to x86, ARM shellcode has made little progress. The x86 hardware is largely homogenous. ARM, however, has several versions and variants across devices today. There are several constraints and subtleties involved in writing production quality ARM shellcode which works on modern ARM hardware, not just on QEMU emulators.
In this talk, we shall explore issues such as overcoming cache coherency, reliable polymorphic shellcode, ARM egghunting and last but not the least, polyglot ARM shellcode. A bonus side effect of this talk will be creating headaches for those who like to defend agaisnt attacks using age old signature based techniques
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Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
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Your campaign sent to target colleagues for approval
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TC74VHC244F PSpice Model (Free SPICE Model)
1. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Device Modeling Report
Bee Technologies Inc.
COMPONENTS : CMOS DIGITAL INTEGRATED CIRCUIT
PART NUMBER : TC74VHC244F
MANUFACTURER : TOSHIBA
5. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
L L L L 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
V1
5
R1
1MEG
LO
LO
0
LO
LO
LO
LO
LO
LO
LO
LO
6. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
L H H H 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
HI
HI
HI
HI
HI
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
HI
LO
0
R1
1MEG
HI
HI LO
V1
5
7. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
Truth Table
Circuit simulation result
Evaluation circuit
Comparison table
Input Output
G An Yn (Measurement) Yn (Simulation)
%Error
H X Z Z 0
TimeTime
0s 0.5us 1.0us
U1:1GBAR
U1:2GBAR
U1:1A1
U1:1A2
U1:1A3
U1:1A4
U1:2A1
U1:2A2
U1:2A3
U1:2A4
U1:1Y1
U1:1Y2
U1:1Y3
U1:1Y4
U1:2Y1
U1:2Y2
U1:2Y3
U1:2Y4
1
1
0
0
0
0
0
0
0
0
Z
Z
Z
Z
Z
Z
Z
Z
R1
1MEG
CLK
DSTM1
OFFTIME = .2uS
ONTIME = .2uS
X
V1
5
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
X
0
HI
HI
8. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
High Level and Low Level Input Voltage
Circuit simulation result
Evaluation circuit
Comparison table
VCC = 5 V Measurement Simulation %Error
Min VIH = (VCC*0.7) V 3.5 3.6252 3.577
Min VIL = (VCC*0.3) V 1.5 1.4951 -0.327
Time
0s 0.5ms 1.0ms 1.5ms 2.0ms
V(OUT) V(V1:+)
0V
2.0V
4.0V
6.0V
(529.901u,1.4951)
(572.504u,3.6252)
Output
Input
V1
TD = 0.5m
TF = 0.1m
PW = 1m
PER = 2m
V1 = 0
TR = 0.1m
V2 = 5
LO
LO
V2
5
0
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
OUT
R3
1MEG
9. All Rights Reserved Copyright (c) Bee Technologies Inc. 2005
High Level and Low Level Output Voltage
Circuit simulation result
Evaluation circuit
Comparison table
VCC = 4.5V Measurement Simulation %Error
VOH (V) 4.5 4.4978 -0.049
VOL (V) 0 0 0
Time
0s 5ms 10ms
V(U1:1A1)
0V
2.5V
5.0V
V(OUT)
0V
2.5V
5.0V
SEL>>
Output
Input
LO
0
R1
0.09MEG
V2
4.5
2A4
2Y4
GND
2Y2
_
_
1Y1
1A1
1Y3
2Y1 1Y4
1A3 2A3
2A2
2Y3
VCC1G
2G
2A1
1A4
1A2
1Y2
U1
74VHC244
V1TD = 0.5m
TF = 3n
PW = 1m
PER = 2m
V1 = 0
TR = 3n
V2 = 4.5
LO