101-0360 Rabbit Semiconductor, 101-0360 Datasheet - Page 50
101-0360
Manufacturer Part Number
101-0360
Description
KIT DEV RABBIT 2000 INT'L
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 2000r
Type
MPU Moduler
Datasheet
1.20-101-0383.pdf
(80 pages)
Specifications of 101-0360
Contents
RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
For Use With/related Products
RCM2000, RCM2010, RCM2020
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
101-360
101-360
101-360
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A.2 Bus Loading
You must pay careful attention to bus loading when designing an interface to the RCM2000.
section provides bus loading for external devices.
Table A-2 lists the capacitance for the various RCM2000 I/O ports.
Table A-3 lists the external capacitive bus loading for the various Rabbit 2000 output
ports. Be sure to add the loads for the devices you are using in your custom system and
verify that they do not exceed the values in Table A-3.
46
Parallel Ports A to E
Data Lines D0–D7
Address Lines A0–A12
Table A-3. External Capacitive Bus Loading -40°C to +85°C
A[12:1]
D[7:1]
A[12:1]
D[7:1]
A0
D0
PD[3:0]
PA[7:0]
PB[7,6]
PC[6,4,2,0]
PD[7:4]
PE[7:0]
All data, address, and I/O
lines with clock doubler
disabled
I/O Ports
* The RCM2020 operating at 18.4 MHz will typically come with a
Output Port
flash EPROM whose access time is 55 ns. Because of the volatil-
ity of the memory market, a 90 ns flash EPROM could be used on
the RCM2020.
Table A-2. Capacitance of RCM2000 I/O Ports
16 pF
Input Capacitance
Typ.
6 pF
—
Clock Speed
25.8, 18.4,
25.8, 18.4
25.8, 18.4
12.9, 9.2
(MHz)
25.8
18.4
(pF)
12 pF
30 pF
Max.
—
Capacitive Loading (pF)
Maximum External
100 for 55 ns flash
55 for 90 ns flash
Output Capacitance
10 pF
24 pF
24 pF
Typ.
100
100
100
50
90
(pF)
RabbitCore RCM2000
*
14 pF
32 pF
32 pF
Max.
This
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