MC68HC705B16NCFN

Product Summary

The MC68HC705B16N is a device similar to the MC68HC05B6, but with increased RAM and 15 kbytes of EPROM instead of 6 kbytes of ROM. In addition, the self-check routines available in the MC68HC05B6 are replaced by bootstrap firmware. The MC68HC705B16N is an OTPROM
(one-time programmable ROM) version of the MC68HC05B16, meaning that once the application program has been loaded in the EPROM it can never be erased. The entire MC68HC05B6 data sheet applies to the MC68HC705B16N, with the exceptions outlined in this appendix.

Parametrics

Absolute maximum ratings:
(1)Supply voltage(Note1), VDD:-0.5 to +7.0 V;
(2)Input voltage (Except VPP1), VIN: VSS – 0.5 to VDD + 0.5 V;
(3)Input voltage,Self-check mode (IRQ pin only),VIN: VSS – 0.5 to 2VDD + 0.5 V;
(4)Operating temperature range,TA TL to TH:Standard (MC68HC05B6):0 to +70℃;Extended (MC68HC05B6C):-40 to +85℃;Automotive (MC68HC05B6M):-40 to +125℃;
(5)Storage temperature range, TSTG:-65℃ to +150℃;
(6)Current drain per pin (excluding VDD and VSS),(Note2)Source,Id:25mA;Sink,Is:45mA
Note:(1) All voltages are with respect to VSS.
(2) Maximum current drain per pin is for one pin at a time, limited by an external resistor.

Features

(1)Fully static design featuring the industry standard M68HC05 family CPU core; (2)On chip crystal oscillator with divide by 2 or a software selectable divide by 32 option (SLOWmode); (3)2.1 MHz internal operating frequency at 5V; 1.0 MHz at 3V; (4)High speed version available; (5)176 bytes of RAM; (6)5936 bytes of user ROM plus 14 bytes of user vectors; (7)256 bytes of byte erasable EEPROM with internal charge pump and security bit; (8)Write/erase protect bit for 224 of the 256 bytes EEPROM; (9)Self test/bootstrap mode; (10)Power saving STOP, WAIT and SLOW modes; (11)Three 8-bit parallel I/O ports and one 8-bit input-only port; (12)Software option available to output the internal E-clock to port pin PC2; (13)16-bit timer with 2 input captures and 2 output compares; (14)Computer operating properly (COP) watchdog timer; (15)Serial communications interface system (SCI) with independent transmitter/receiver baud rateselection; receiver wake-up function for use in multi-receiver systems; (16)8 channel A/D converter; (17)2 pulse length modulation systems which can be used as D/A converters; (18)One interrupt request input plus 4 on-board hardware interrupt sources; (19)Available in 52-pin plastic leaded chip carrier (PLCC), 64-pin quad flat pack (QFP) and 56-pinshrink dual in line (SDIP) packages; (20)Complete development system support available using the MMDS05 development station withthe M68HC05B32EM emulation module; (21)Extended operating temperature range of -40℃ to +125℃

Diagrams

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