668-0003-C Rabbit Semiconductor, 668-0003-C Datasheet - Page 148

• Manufacturer Part Number: 668-0003-C
• Description: IC CPU RABBIT2000 30MHZ 100PQFP
• Manufacturer: Rabbit Semiconductor

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

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
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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
+
+