Table 1—Start thinking “Ethernet,” because the E-Chips are coming to town.
NetSilicon NS7520 Motorola MCF5282 Zilog eZ80F91 Rabbit R4000 Maxim DS80C400
CPU ARM7TMDI (55 MHz) ColdFire V2 (66 MHz) eZ80 (50 MHz) Rabbit 4000 (70 MHz) C390 (75 MHz)
On-chip memory 2.5-KB SRAM

512-KB flash memory,
8-KB SRAM,
2-KB cache

256-KB flash memory,
16-KB SRAM 		None 9.5-KB SRAM,
64-KB ROM
Expansion bus 26-bit address,
8-, 16-, and 32-bit data		 24-bit address,
8-, 16-, and 32-bit data 		24-bit address,
8-bit data 		20-bit address,
8-bit data

24-bit address,

8-bit data

Ethernet 10/100 MII 10/100 MII 10/100 MII 10BaseT full-duplex only 10/100 MII
Peripherals

Timers (4),
serial ports (2)

 Timers (17),
serial ports (3),
clock-serial ports (2),eight-channel 10-bit
ADC, CAN

Timers (6),
serial ports (2),
clock serial ports (2)

Timers (12),
serial ports (6),
quadrature decode,
slave interface 		Timers (5),
serial ports (3),
1-wire port, CAN
Power (est.) 1.5-V core,
3.3-V I/O, 0.5 W 		3.0 V, 0.5 W 3.3 V, 0.2 W 2.5-V core,
3.3-V I/O, 0.2 W 		1.8-V core, 3.3-V I/O, 0.2 W
Package 177-pin BGA 256-pin BGA 144-pin QFP 144-pin BGA 100-pin QFP