20-668-0003 Rabbit Semiconductor, 20-668-0003 Datasheet - Page 16
![IC CPU RABBIT2000 30MHZ 100PQFP](/photos/6/76/67658/316-100-pqfp_sml.jpg)
20-668-0003
Manufacturer Part Number
20-668-0003
Description
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0003.pdf
(228 pages)
Specifications of 20-668-0003
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
Data Bus Width
8 bit
Maximum Clock Frequency
30 MHz
Operating Supply Voltage
0 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
40
Number Of Timers
8 & 10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
20-668-0003
316-1062
316-1062
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
20-668-0003
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
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2.2.5 Slave Port
The slave port is designed to allow the Rabbit to be a slave to another processor, which
could be another Rabbit. The port is shared with parallel port A and is a bidirectional data
port. The master can read any of three registers selected via two select lines that form the
register address and a read strobe that causes the register contents to be output by the port.
These same registers can be written as I/O registers by the Rabbit slave. Three additional
registers transmit data in the opposite direction. They are written by the master by means
of the two select lines and a write strobe.
Figure 2-2 shows the data paths in the slave port.
The slave Rabbit can read the same registers as I/O registers. When incoming data bits are
written into one of the registers, status bits indicate which registers have been written, and
an optional interrupt can be programmed to take place when the write occurs. When the
slave writes to one of the registers carrying data bits outward, an attention line is enabled
so that the master can detect the data change and be interrupted if desired. One line tells
the master that the slave has read all the incoming data. Another line tells the master that
new outgoing data bits are available and have not yet been read by the master. The slave
port can be used to direct the master to perform tasks using a variety of communication
protocols over the slave port.
2.2.6 Timers
The Rabbit has several timer systems. The periodic interrupt is driven by the 32.768 kHz
oscillator divided by 16, giving an interrupt every 488 µs if enabled. This is intended to be
used as a general-purpose clock interrupt. Timer A consists of five 8-bit countdown and
reload registers that can be cascaded up to two levels deep. Each countdown register can
be set to divide by any number between 1 and 256. The output of four of the timers is used
to provide baud clocks for the serial ports. Any of these registers can also cause interrupts
and clock the timer-synchronized parallel output ports. Timer B consists of a 10-bit
10
Master
Processor
Control
Figure 2-2. Slave-Port Data Paths
Slave Interface Registers
Output Registers
Input Register
Rabbit
Rabbit 2000 Microprocessor User’s Manual
CPU
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