MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 48

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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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC705B16CFN
Manufacturer:
MOT
Quantity:
5 510
3
(1) This register is implemented in EEPROM; therefore reset has no effect on the individual bits.
3.5.4
To program a byte of EEPROM, the following steps should be taken:
While a programming operation is being performed, any access of the EEPROM array will not be
successful.
Warning: To program a byte correctly, it has to have been previously erased. It is advised that this
If a second word is to be programmed, it is important that the E1LAT bit be reset before restarting
the programming sequence otherwise any write to a new address will have no effect. This
condition provides a higher degree of security for the stored data.
User programs must be running from the RAM or ROM as the EEPROM will have its address and
data buses latched.
Note:
3.5.5
This register (OPTR), located at $0100, contains the secure and protect functions for the
EEPROM and allows the user to select options in a non-volatile manner. The contents of the
OPTR register are loaded into data latches with each power-on or external reset.
Freescale
3-6
1 Set the E1LAT bit.
2 Write address/data to the EEPROM address to be programmed.
3 Set the E1PGM bit.
4 Wait for time t
5 Reset the E1LAT bit (to logic zero).
Options (OPTR)
is done only for 0→1 transitions, as this saves excessive overwriting of EEPROM.
224 bytes of EEPROM (address $0120 to $01FF) can be program and erase protected
under the control of bit 1 of the OPTR register detailed in
EEPROM programming operation
Options register (OPTR)
(1)
PROG1
Address
$0100
.
MEMORY AND REGISTERS
bit 7
bit 6
bit 5
bit 4
bit 3
Section
bit 2
EE1P
bit 1
3.5.5.
MC68HC05B6
SEC Not affected
bit 0
Rev. 4.1
on reset
State

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