Rabbit 2000 - Page 10

4 Rabbit 2000 Microprocessor
Figure 1-1 shows a block diagram of the Rabbit.
Figure 1-1. Block Diagram of the Rabbit Microprocessor
CPU
External Interface
Data
Buffer
Memory
Management/
Control
Address
Buffer
Memory Chip
Interface
Parallel
Port A
Parallel
Port B
Parallel
Port C
Parallel
Port D
Global
Control
Main
Oscillator
Parallel
Port E
Timer A
Timer B
Serial Port A
Asynch
Serial
Synch
Serial
Asynch
Bootstrap
Synch
Bootstrap
Real-Time
Clock
Serial Port B
Asynchronous
Serial
Synchronous
Serial
32.768 kHz
Oscillator
Watchdog
Timer
Asynchronous
Serial
Serial Port C
Periodic
Interrupts
Asynchronous
Serial
Serial Port D
External I/O
Chip Interface
Slave Port
Slave Interface
External
Interrupts
/RESET
/IOWR
/IORD /BUFEN
SMODE0
SMODE1
STATUS
/WDTOUT
CLK
DATA BUS
(8 bits)
D0D7
A0A19
XTALB1
XTALB2
XTALA1
XTALA2
I0I7
INT0A, INT1A
INT0B, INT1B
/CS0, /CS1, /CS2
/OE0, /OE1
/WE0, /WE1
PA0PA7
PB0PB7
PC0PC7
PD0PD7
PE0PE7
TXA, RXA, CLKA,
ATXA, ARXA
TXB, RXB, CLKB,
ATXB, ARXB
TXC, RXC
TXD, RXD
SD0SD7,
SA0SA1,
/SCS, /SRD, /SWR,
/SLAVEATTN
ADDRESS BUS
(8 bits)
Bootstrap Interface