MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 195

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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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ECLK
See
E1ERA — EEPROM erase/programming bit
Providing the E1LAT and E1PGM bits are at logic one, this bit indicates whether the access to the
EEPROM is for erasing or programming purposes.
Once the program/erase EEPROM address has been selected, E1ERA cannot be changed.
E1LAT — EEPROM programming latch enable bit
STOP, power-on and external reset clear the E1LAT bit.
Note:
E1PGM — EEPROM charge pump enable/disable
When the charge pump generator is on, the resulting high voltage is applied to the EEPROM array.
This bit cannot be set before the data is selected, and once this bit has been set it can only be
cleared by clearing the E1LAT bit.
A summary of the effects of setting/clearing bits 0, 1 and 2 of the control register are given in
Note:
MC68HC05B6
Rev. 4.1
Section
1 (set)
0 (clear) –
1 (set)
0 (clear) –
1 (set)
0 (clear) –
After the t
to zero in order to clear the E1ERA bit and the E1PGM bit.
The E1PGM and E1ERA bits are cleared when the E1LAT bit is at zero.
4.3.
E1ERA E1LAT E1PGM
ERA1
An erase operation will take place.
A programming operation will take place.
Address and data can be latched into the EEPROM for further
program or erase operations, providing the E1PGM bit is cleared.
Data can be read from the EEPROM. The E1ERA bit and the E1PGM
bit are reset to zero when E1LAT is ‘0’.
Internal charge pump generator switched on.
Internal charge pump generator switched off.
0
0
0
1
1
Table E-3 EEPROM control bits description
erase time or t
0
1
1
1
1
0
0
1
0
1
MC68HC705B16
PROG1
Read condition
Ready to load address/data for program/erase
Byte programming in progress
Ready for byte erase (load address)
Byte erase in progress
programming time, the E1LAT bit has to be reset
Description
Table
Freescale
E-3.
E-7
14

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