MCHC705JJ7CPE Freescale Semiconductor, MCHC705JJ7CPE Datasheet - Page 122
![IC MCU 8BIT 224 BYTES RAM 20PDIP](/photos/38/0/380057/pdip20_sml.jpg)
MCHC705JJ7CPE
Manufacturer Part Number
MCHC705JJ7CPE
Description
IC MCU 8BIT 224 BYTES RAM 20PDIP
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet
1.MC705JJ7CDWE.pdf
(164 pages)
Specifications of MCHC705JJ7CPE
Core Processor
HC05
Core Size
8-Bit
Speed
2.1MHz
Connectivity
SIO
Peripherals
POR, Temp Sensor, WDT
Number Of I /o
14
Program Memory Size
6KB (6K x 8)
Program Memory Type
OTP
Ram Size
224 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Processor Series
HC705JJ
Core
HC05
Data Bus Width
8 bit
Data Ram Size
224 B
Interface Type
SIOP
Maximum Clock Frequency
2.1 MHz
Number Of Programmable I/os
14
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 4 Channel
Package
20PDIP
Family Name
HC05
Maximum Speed
2.1 MHz
Operating Supply Voltage
3.3|5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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EPROM/OTPROM
13.2.3 EPROM Security Bit
An EPROM programmable bit is provided at the location of the COP watchdog register at $1FF0 as shown
in
locations will return undefined results when the EPMSEC bit is set. Refer to
Programming
EPMSEC — EPROM Security
13.3 EPROM Programming
A programming board is available from Freescale to download to the on-chip EPROM/OTPROM using
the factory-provided programming software. Factory-provided software for programming the PEPROM is
available on the World Wide Web at:
The programming software copies to the 6144-byte space located at EPROM addresses $0700–$1EFF
and to the 16-byte space at addresses $1FF0–$1FFF which includes the mask option register at address
$1FF1, and the security bit at address $1FF0.
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the EPROM/OTPROM
122
difficult for unauthorized users.
Figure
This EPROM write-only bit enables the access to the EPROM array.
http://www.freescale.com
1 = Access to the EPROM array in non-user modes is denied.
0 = Access to the EPROM array in non-user modes is enabled.
13-3. This bit allows control of access to the EPROM array. Any accesses of the EPROM
Address:
Erased:
for programming instructions.
To program the EPROM/OTPROM, MOR, or EPMSEC bits properly, the
V
Reset:
Read:
Write:
Figure 13-3. EPROM Security in COP and Security Register (COPR)
DD
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
voltage must be greater than 4.5 volts.
$1FF0
EPMSEC
Bit 7
0
(1)
= Unimplemented
OPT
—
6
—
5
NOTE
Unaffected by reset
—
4
—
3
—
2
13.3.2 EPMSEC
—
1
Freescale Semiconductor
COPC
Bit 0
—
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