MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 171

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MC68HC705B16CFN

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

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

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The bootstrap program first copies part of itself into RAM, as the program cannot be executed in
ROM during verification/programming of the EPROM. It then sets the TCMP1 output to a logic high
level.
MC68HC05B6
Rev. 4.1
Parallel EPROM bootstrap
A
Bad EPROM programming
Y
green LED flashes
Program EPROM;
Programming OK?
Figure C-3 Modes of operation flow chart (1 of 2)
Red LED on
TCAP1 set?
parallel load;
IRQ at 9V?
PD4 set?
PD3 set?
N
N
N
Reset
Y
Y
Bootstrap mode
N
N
Y
Y
MC68HC705B5
Non-user mode
PD2 set?
Y
EPROM verified
Green LED on
N
Non-user mode
Green LED on
User mode
EPROM
erased?
Y
N
EPROM not erased
Red LED on
Freescale
C-9
14

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