101-0401 Rabbit Semiconductor, 101-0401 Datasheet - Page 71
![KIT DEV RABBIT2000/TCP/IP](/photos/9/28/92836/101-0401_sml.jpg)
101-0401
Manufacturer Part Number
101-0401
Description
KIT DEV RABBIT2000/TCP/IP
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 2000r
Type
MPU Moduler
Datasheet
1.101-0402.pdf
(82 pages)
Specifications of 101-0401
Rohs Status
RoHS non-compliant
Contents
Rabbit 2000™ TCP/IP Development Board, Demo Board, Power Supply, Cable and Software
Processor To Be Evaluated
Rabbit 2000
Interface Type
RS-232, RS-485
For Use With/related Products
RCM2000, RCM2010, RCM2020
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
101-0401
316-1005
Q906133
316-1005
Q906133
- Current page: 71 of 82
- Download datasheet (2Mb)
Transistors Q5 and Q6 are of opposite polarity so that a rail-to-rail voltage can be passed.
When the /CS1 voltage is low, Q5 will conduct. When the /CS1 voltage is high, Q6 will
conduct. It takes time for the transistors to turn on, creating a propagation delay. This
delay is typically very small, about 10 ns to 15 ns.
The signal that turns the transistors on is a high on the processor’s reset line, /RES. When
the TCP/IP Development Board is not in reset, the reset line will be high, turning on n-
channel Q5 and Q7. Q7 is a simple inverter needed to turn on Q6, a p-channel MOSFET.
When a reset occurs, the /RES line will go low. This will cause C14 to discharge through
R32 and R34. This small delay (about 160 µs) ensures that there is adequate time for the
processor to write any last byte pending to the SRAM before the processor puts itself into
a reset state. When coming out of reset, CS will be enabled very quickly because D1 con-
ducts to charge capacitor C14.
Getting Started
67
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