The 68HC11  MCU family


  The following are Motorola flavors:

   
HC11 A Series
       8K ROM (A8), ROMless (A0,A1), 256 RAM, 512 EEPROM (A1,A8), SPI,
       SCI, 3 IC 5 OC, 8 channel 8 bit A/D

    
HC11 C0
       Nice new device developed together with AT&T.  ROMless, on board
       bank switching to support memory maps of up to 256K.  Totally
       glueless interface - Chip selects on board, Read Enable and
       Write Enable signals now generated on chip.  256 RAM, 8 channel 8
       bit A/D - Good pricing

   
HC11 D Series
       Smallest and lowest cost member of the hc11 Family.  ROMless (D0),
       4K ROM (D3), 4K EPROM (711D3) - No A-D or EEPROM.  Still has
       standard timers and serial ports

   
HC11 E Series
       Same as A series execpt 512 bytes RAM and 512 EEPROM (2048 for
       E2).  Pin compatible, only difference is one timer pin (PA4) can
       now be used for IC or OC instect of just OC.  Also have EPROM
       devices and larger memory - hc711e9 (12K OTP), hc711e20 (20K
       OTP)


   
HC11 F series
       ROMless, non multiplexed address/data bus with 4 chip selects
       built in.  1K RAM, 512 bytes EEPROM - otherwise same peripherals
       as E series


   
HC11 G Series
       16K ROM/EPROM, Non mulitplexed address/data bus, 512 RAM, 4
       channel PWM, 10 Bit A/D convertor, 2 separate 16 bit timers


   
HC11 K4
       24K ROM/EPROM, 1Mb addressing using on chip memory mapping.  Non
       multiplexed address and data  bus. 4 programmable chip selects, 8
       channel 8 bit A/D.  4 channel PWM, 768 bytes RAM

 

Source:  http://www.faqs.org/faqs/microcontroller-faq/68hc11/

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