668-0003-C Rabbit Semiconductor, 668-0003-C Datasheet - Page 148
668-0003-C
Manufacturer Part Number
668-0003-C
Description
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0003.pdf
(228 pages)
Specifications of 668-0003-C
Rohs Status
RoHS non-compliant
Processor Type
Rabbit 2000 8-Bit
Speed
30MHz
Voltage
2.7V, 3V, 3.3V, 5V
Mounting Type
Surface Mount
Package / Case
100-MQFP, 100-PQFP
Features
-
Other names
316-1004
668-0003
668-0003
Available stocks
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Quantity
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Part Number:
668-0003-C
Manufacturer:
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The slave port lines are shown in Figure 13-1. The function of these lines is described
below.
• SD0–SD7—These are bidirectional data lines, and are generally connected to the data
• SA1, SA0—These are address lines used to select one of the four data registers of the
• /SCS—Input. Slave chip select. The slave ignores read or write requests unless the
• /SRD—Input. If /SCS is also low, this line pulled low causes the contents of the regis-
• /SWR—Input. If /SCS is also low, this line causes the data bits on the data bus to be
142
bus of the master processor. Multiple slaves can be connected to the data bus. The
slave drives the data lines only when /SCS and /SRD are both pulled low.
slave interface. Normally these lines are connected to the low-order address lines of
the master. The master always drives these lines which are always inputs to the slave.
chip select is low. If a Rabbit is used as a master, this line can be connected to one of
the master’s programmable chip select lines /I0–/I7.
ter selected by the address lines to be driven on the data bus. If a Rabbit is used as a
master, this line is normally connected to the global I/O read strobe /IORD.
clocked into the register selected by the address lines on the rising edge of /SWR or
/SCS, whichever rises first. If a Rabbit is used as a master, this line is normally con-
nected to the global I/O write strobe /IOWR.
Master Rabbit
Pulldown
Reset
Figure 13-4. Typical Connection Slave Rabbit to Master Rabbit
D0–D7
portout
/IOWR
INT1A
/IORD
INT0A
CLK
/I6
A0
A1
/I7
Rabbit 2000 Microprocessor User’s Manual
/SRD
/SWR
SA0
SA1
/XTALB1
/SLAVEATTN
/SCS
/RESET
/SLAVEATTN
/SCS
SD0–SD7
Second Slave Rabbit
First Slave Rabbit
SMODE0
SMODE1
SMODE0
SMODE1
+
+
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