101-1218 Rabbit Semiconductor, 101-1218 Datasheet - Page 99
101-1218
Manufacturer Part Number
101-1218
Description
KIT APPLCTN RABBITCORE RCM4010
Manufacturer
Rabbit Semiconductor
Series
RabbitCore®r
Datasheet
1.20-101-1094.pdf
(130 pages)
Specifications of 101-1218
Main Purpose
*
Embedded
*
Utilized Ic / Part
RCM4010
Primary Attributes
*
Secondary Attributes
*
Processor To Be Evaluated
Rabbit 4000
Interface Type
Ethernet
Operating Supply Voltage
12 V
Lead Free Status / RoHS Status
Not applicable / Not applicable
Other names
316-1156
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Table A-8 lists the delays in gross memory access time for several values of VDD
The measurements are taken at the 50% points under the following conditions.
• T = -40°C to 85°C, V = VDD
• Internal clock to nonloaded CLK pin delay 1 ns @ 85°C/3.0 V
The clock to address output delays are similar, and apply to the following delays.
• T
• T
• T
• T
• T
• T
The data setup time delays are similar for both T
When the spectrum spreader is enabled with the clock doubler, every other clock cycle is
shortened (sometimes lengthened) by a maximum amount given in the table above. The
shortening takes place by shortening the high part of the clock. If the doubler is not
enabled, then every clock is shortened during the low part of the clock period. The maxi-
mum shortening for a pair of clocks combined is shown in the table.
Rabbit’s Technical Note TN227, Interfacing External I/O with Rabbit Microprocessor
Designs, contains suggestions for interfacing I/O devices to the Rabbit 4000 microproces-
sors.
User’s Manual
VDD
(V)
adr
3.3
1.8
CSx
IOCSx
IORD
IOWR
BUFEN
, the clock to address delay
IO
, the clock to memory chip select delay
, the clock to I/O read strobe delay
, the clock to I/O write strobe delay
, the clock to I/O chip select delay
, the clock to I/O buffer enable delay
30 pF 60 pF 90 pF
Clock to Address
18
6
Output Delay
Table A-8. Preliminary Data and Clock Delays
(ns)
24
8
11
33
IO
Data Setup
Time Delay
±10%
(ns)
1
3
0.5 ns setting
setup
no dbl / dbl
2.3 / 2.3
7 / 6.5
and T
Spectrum Spreader Delay
hold
.
Worst-Case
1 ns setting
no dbl / dbl
3 / 4.5
8 / 12
(ns)
2 ns setting
no dbl / dbl
11 / 22
4.5 / 9
IO
.
93
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