MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 219

• Manufacturer Part Number: MC68HC705B16CFN
• Description: IC MCU 2.1MHZ 15K OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705B16CFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 15KB (15K x 8)
• Program Memory Type: OTP
• Eeprom Size: 256 x 8
• Ram Size: 352 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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.
MC68HC05B6
Rev. 4.1
The MC68HC705B16N is a new device identical to the MC68HC705B16 in its memory
map and functionality, except for the following:
•
•
•
•
On the MC68HC705B16 there was a requirement to reset the device a second time
after power-on. On the MC68HC705B16N this reset twice action is now not required.
The interrupt service routine for the vector at address $3FF0–$3FF1 is no longer
required, as the vector will never be fetched. However, the interrupt service routine and
vector contents required for the MC68HC705B16 (see
be kept on the MC68HC705B16N with no detrimental effect, although they will never
be used.
Bootloader
Reset pulse width
Reset twice issue
Electrical characteristics
MC68HC705B16N
MC68HC705B16N
F
Section
E, page E–1) can also
Freescale
F-1
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