4
4-5
Unreg DC
+5V
3.3V
Reg
1.8V
Reg
5V
Reg
3.3V
LAN Reset
ARM9 Processor
RAM
FLASH
+5
+5
Latch
Diagnostic LEDs
µP BUS
LAN
INTFC
Mag
TCP/IP
LAN
RS-422/RS-485
RS-232
USB
INTFC
Mag
USB
GPIB
INTFC
GPIB
Bus
Figure 4-3 9009 block Diagram
The GPIB interface uses industry standard GPIB bus transceivers and a 7210
type GPIB interface chip drive the GPIB bus with 5 Vdc signals. The 5 Vdc
signals are buffered to prevent 5 Vdc from reaching the processor and memory
chips.
The USB interface uses a USB to serial conversion chip that communicates
serially with the processor at 115200 baud.
The 9009's accepts regulated 5 Vdc power or 5.5 to 15 Vdc unregulated power.
The input power is passed thru a low dropout linear regulator with a 5 Vdc
output. A jumper lets the user select the regulated or direct input DC power
for the board. The res5 Vdc power is down regulated to make 3.3 and
1.8 Vdc for the ARM9 processor and the supporting chips that run on 3.3 Vdc
power. A DC-DC charge pump converter in the RS-232 transceiver IC makes
± 9 Vdc to operate the RS-232 drivers.
Содержание 9099
Страница 20: ...1 16 1 Figure 1 1 9009 Outline Dimensions ...
Страница 24: ...1 20 1 Figure 1 3 9099 Certificate of Compliance ...
Страница 54: ...3 8 3 Figure 3 1 Status Reporting Structure Flash Configuration Reset ...
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Страница 161: ...A 49 A4 Refer to the ErrorLogger utility for the error value definitions Error Meaning 0 No error ...