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Chapter 8: Theory of Operation
Main Assembly Theory
P/O
MAIN
ASSEMBLY
_
-
oe
hs
INTERFACE CIRCUITS
'
|
RESET/
-
\
PRESET
f
ACQUISITION
)
| |
INTERFACE
eet
!
ae
'
PERPHERAL
W404 |
[ag
ADDRESS
INTERFACE
_
>
1
REALTIME
!
CLOCK
4
CPU
Sa]
MEMORY,
DISPLAY
|
BOOT ROM
INTERF ACE
1
A
NV RAM
»_|_v301
|,
SYST RAM
RAM FRAME GEN
FLASH ROM
VIDEO DAC
1
,
1
«
|
DISK DRIVER
J402
3
INTERFACE
alia
P
8
8
HP - IB
yaar |,
ia
INTERFACE
2
Ld
|
oO
RS232
INTERFACE
KEYBOARD
—]
INTERFACE
CONTROL
CLOCK
LOGIC
25MHZ
=a
\
t
CLICKER
~
|
22MHZ
1
28
MHZ
|
5MHZ
1
1
§4542855
POWER
SUPPLY
ASSEMBLY
System Control Diagram
System Control
The system control consists of the microprocessor, co-processor, ROM, RAM, and the inter-
face circuitry needed to control the acquisition section and peripherals.
Peripherals include
the real time clock, display, keyboard, disk drive, RS-232, and HP-IB. The figure above shows
the block diagram for the system control. The system control is the same for all models.
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