101-1226 Rabbit Semiconductor, 101-1226 Datasheet - Page 79
![RCM3900 DEV KIT UNIVERSAL](/photos/9/22/92206/101-1226_sml.jpg)
101-1226
Manufacturer Part Number
101-1226
Description
RCM3900 DEV KIT UNIVERSAL
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 3900r
Type
MPU Moduler
Datasheet
1.20-101-1196.pdf
(168 pages)
Specifications of 101-1226
Contents
RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
For Use With/related Products
RCM3900
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1137
- Current page: 79 of 168
- Download datasheet (3Mb)
Table A-4 lists the delays in gross memory access time.
The measurements are taken at the 50% points under the following conditions.
• T = -40°C to 85°C, V = V
• 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 2000/3000 Designs, con-
tains suggestions for interfacing I/O devices to the Rabbit 3000 microprocessors.
RabbitCore RCM3900 User’s Manual
Table A-4. Data and Clock Delays VIN ±10%, Temp, -40°C–+85°C (maximum)
adr
CSx
IOCSx
IORD
IOWR
BUFEN
3.3 V
VIN
, the clock to address delay
, 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
Clock to Address Output Delay
30 pF
6
60 pF
(ns)
DD
8
±10%
90 pF
11
Data Setup
Time Delay
setup
(ns)
and T
1
hold
Spectrum Spreader Delay
.
no dbl/dbl
Normal
3/4.5
(ns)
no dbl/dbl
Strong
4.5/9
79
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