Agilent Technologies Ininiium 9000 Especificaciones Pagina 158

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Chapter 8: Theory of Operation
Block-Level Theory
158
Figure 8-1
Keyboard and autoprobe block diagram
Disk Drive
The hard disk drive is a high-capacity, shock-resistant unit. It is used to store the oscilloscope’s operating
system and certain system configuration data.
The drive can also be used to store and recall oscilloscope setups and waveforms.
I2C Mux
PCA9544
PC
mother
board
USB
USB HUB
ISP1521
Micro-controller
PIC18F4455
4
Push Button(22)
Matrix
(3x8)
Encoder
Matrix(14)
(4x4)
Scannin g matrix
Vref
OCx PSWx
Keyboard block diagram with key components
version 4.0 04/24/2007
Power interface
24 MHz
crystal
24 MHz
crystal
USB1
Autoprobe
Interface
Probe ID
Autoprobe
I2C
Interface
16bit DAC
DAC8534
+Vp/-Vp
regulator
+1 2
-12
+Vp -Vp
A
u
t
o
p
r
o
b
e
I
n
t
e
r
f
a
c
e
4
4
Analog
signal
USB
12V(analog)
5V(analog)
3.3V(analog)
Digital
signal
4
+5V
(3%)
Over current
protection
SCLSDATA
8
LED
Matrix
(24
LED)
24
5V(digital)
3.3V (d igital)
offset
data clock
Rprog
Voltage to
current
4
Customers function
Customer’s function
Custome r s fun ction
Touch Screen
USB 2
4
-Vp +Vp offset data Rid clock Rprog -12V +12V
ADC
CL
Data
.
4
CalOffset
OSC1
USB 3
USB 4
USB 5
.
.
Divider
RC5
RC4
FPGA
XC 3 S 1 0 0
FPGA
XC 3 S 1 0 0
3.3V
7
Port D
(8 bits)
RB0 RB1
A DC: RA0 , RA1, RA2,
RA5
RA3
Caloffset: RB2, RB5,
RB6, RB7
Enable
I2C GPIO
PCA95 54
.
.
Port E
SPP
co ntrol
(4 bits)
5.0V
Regulator
LT1236
5.0V Regulator
LM1117
4
8
2.5V
Voltage
divider
1. 2V/2 .5(dig ital)
3.3V
Voltage
divider
Reset (RC0)
3.0V
Voltage
divider
To PIC
Line protection
RA6/CLK
8 LED
Shift
register
8
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