MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 168

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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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14
(1) This bit is a copy of the EPP bit in the options register at $1EFE and therefore its state on reset will be the same as that for the
C.3
C.3.1
Bit 7 — Factory use only
This bit is strictly for factory use only and will always read zero.
EPPT — EPROM protect test bit
This bit is a copy of the EPROM protect bit (EPP) located in the option register. When ELAT is set,
the EPPT bit can be tested by the software to check if the EPROM array is protected or not, since
the EPROM content is not available when ELAT is set.
POR or external reset modifies this bit to reflect the state of the EPP bit in the options register.
ELAT — EPROM programming latch enable bit
STOP, power-on and external reset clear this bit.
EPGM — EPROM programming bit
This bit is the EPROM program enable bit. It can be set to ‘1’ to enable programming only after
ELAT is set and at least one byte is written to the EPROM. It is not possible to clear EPGM by
software, but clearing ELAT will always clear EPGM.
ECLK — External clock option bit
See
Freescale
C-6
EPP bit.
Section
EPROM/ECLK control
1 (set)
0 (clear) –
4.3.
EPROM registers
EPROM control register
When set, this bit allows latching of the address and up to 4 data
bytes for further programming, provided EPGM is zero.
When cleared, program and interrupt routines can be executed and
data can be read in the EPROM or firmware ROM.
Address
$0007
bit 7
MC68HC705B5
EPPT
bit 6
(1)
ELAT EPGM ECLK
bit 5
bit 4
bit 3
bit 2
bit 1
MC68HC05B6
bit 0
u?00 0uuu
Rev. 4.1
on reset
State

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