20-101-1246 Rabbit Semiconductor, 20-101-1246 Datasheet - Page 93
20-101-1246
Manufacturer Part Number
20-101-1246
Description
CORE MODULE RCM5400W
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1246.pdf
(120 pages)
Specifications of 20-101-1246
Module/board Type
MPU Core Module
Wireless Frequency
73.73 MHz
For Use With/related Products
RCM5400W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1148
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Table A-6 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 = -20°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 Semiconductor’s Technical Note TN227, Interfacing External I/O with Rabbit
Microprocessor Designs
tions for interfacing I/O devices to the Rabbit 5000 microprocessors.
OEM User’s Manual
VDD
(V)
3.3
1.8
adr
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-6. Preliminary Data and Clock Delays
(ns)
24
8
, which is included with the online documentation
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)
, contains sugges-
2 ns setting
no dbl / dbl
11 / 22
4.5 / 9
IO
.
87
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