MC68HC05B6_13 Datasheet, PDF (163/302 Pages) Freescale Semiconductor, Inc – Microcontrollers

C
MC68HC705B5
The MC68HC705B5 is a device similar to the MC68HC05B6, but with the 6 kbytes ROM and 256
bytes EEPROM replaced by a single EPROM array. In addition, the self-check routines available
on the MC68HC05B6 are replaced by bootstrap firmware. The MC68HC705B5 is intended to
operate as a one time programmable (OTP) version of the MC68HC05B6 without EEPROM or the
MC68HC05B4, meaning that the application program can never be erased once it has been
loaded into the EPROM. The entire MC68HC05B6 data sheet applies to the MC68HC705B5, with
the exceptions outlined in this appendix.
C.1
Features
• 6206 bytes EPROM (including 14 bytes User vectors)
• No EEPROM
• Bootstrap firmware
• Simultaneous programming of up to 4 bytes
• Data protection for program code
• Optional pull-down resistors on port B and port C
• MC68HC05B6 mask options are programmable using control bits held in the options register
• 52-pin PLCC and 56-pin SDIP packages
• High speed version not available
MC68HC05B6
Rev. 4.1
MC68HC705B5
14
Freescale
C-1