Rabbit 4000 running up to 59 MHz
512K Flash, 256K / 512K Data SRAM
Up to 40 GPIO, up to 6 CMOS-compatible serial ports
Auxiliary I/O feature for reducing processor bus loading
Microprocessor Rabbit® 4000 at 59 MHz Rabbit® 4000 at 29 MHz Rabbit® 4000 at 59 MHz
Flash Memory 512K
Data SRAM 512K 256K 512K
Fast Program-Execution SRAM 512K None 512K
Backup Battery Connection for user-supplied backup battery (to support RTC and data SRAM)
General-Purpose I/O 29 parallel digital I/O lines:
Configurable with 4 layers of alternate functions
40 parallel digital I/O lines:
Configurable with 4 layers of alternate functions