101-1272 Rabbit Semiconductor, 101-1272 Datasheet - Page 85
101-1272
Manufacturer Part Number
101-1272
Description
KIT MESH NETWORK ADD-ON RCM4510W
Manufacturer
Rabbit Semiconductor
Type
Microprocessorr
Datasheet
1.20-101-1207.pdf
(118 pages)
Specifications of 101-1272
Product
Modules
Data Bus Width
12 bit
Processor Type
Rabbit 4000
Sram
512 KB
Number Of I/os
20
Description/function
Computer Module
Interface Type
Ethernet
For Use With/related Products
RCM4510W
Lead Free Status / RoHS Status
Not applicable / Not applicable
Other names
316-1158
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Table A-7 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.
Technical Note TN227, Interfacing External I/O with Rabbit Microprocessor Designs,
contains suggestions for interfacing I/O devices to the Rabbit 4000 microprocessors.
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-7. 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
.
79
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