AN-005: W65C265S Replacement Notes for 16-bit Microcontrollers

The following is a comparison of the W65C265S with the Motorola DragonBall 68328 and Intel 186. It is meant to list some features and provide users of the DragonBall and Intel 186 with a state of the art RoHS compliant alternative.

W65C265S Comparison with Motorola DragonBall 68328 and Intel 186

Motorola DragonBall 68328	Intel 186	WDC W65C265
16-bit static CPU	16-bit static CPU	16-bit static CPU
2 timer/counters	3 timer/counters	3 timer/counters
4 GByte	1MB address space	16MB address space
Clock generator	Clock generator	Clock generator
DRAM Controller	DRAM refresh	N/A
Interrupt Controller	Interrupt controller	Interrupt controller
CMOS Input Levels	CMOS input levels	CMOS input levels
Power Management	Power management	Power management
Watch dog timer	Watch dog timer (on some versions)	Watch dog timer
1 UART, 2 SPI	Serial channels	4 UARTs (with 2 baud rate timers)
78 I/O ports	22 I/O ports	64 I/O ports
32 bit address bus	20-bit address bus	24-bit address bus
8/16 CPU Ext/Int bit data bus	16/16 CPU Ext/Int bit data bus	8/16 CPU Ext/Int bit data bus
N/A	N/A	Parallel Interface Bus
?	N/A	8192 Byte Built-in Monitor ROM
Interrupt	N/A	Edge interrupts
16 Chip Selects	4 Chip Selects	8 Chip Selects
?	N/A	576 bytes on-chip SRAM
N/A	N/A	29 on-chip interrupts
144 pin TQFP	68 pin PLCC	84 pin PLCC/100 QFP
N/A	4 Channel DMA controller	N/A
?	4 MB bus bandwidth @ 8MHz	8 MB bus bandwidth @ 8MHz
PCMCIA 1.0 support	N/A	PCMCIA 1.0 Support (see Mensch computer)
PWM output	N/A	Pulse Width Modulation output/Pulse Width Measurement input
Real Time clock	N/A	Real Time clock
LCD control module (on-chip) 640 x 480	N/A	N/A
JTAG	N/A	N/A
System Integration Module (Internal)	N/A	N/A
2.7 MIPS @ 16.67 MHz	?	8.33 MIPS @ 16.67 MHz
N/A	N/A