MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 193

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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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E.2
When using an external clock the OSC1 and OSC2 pins should be driven in antiphase (see
Figure
external clock input. The equivalent specification of the external clock source should be used in
lieu of t
E.3
The MC68HC705B16 memory map is given in
of EPROM (including 14 bytes for User vectors) and 256 bytes of EEPROM.
The EPROM array is supplied by the VPP6 pin in both read and program modes. Typically the
user’s software would be loaded into a programming board where V
bootstrap loader routines. It would then be placed in an application where no programming occurs.
In this case the VPP6 pin should be hardwired to V
Warning: A minimum V
E.3.1
The execution of a program in the EPROM address range or a load from the EPROM are both
read operations. The E6LAT bit in the EPROM/EEPROM control register should be cleared to ‘0’
which automatically resets the E6PGM bit. In this way the EPROM is read like a normal ROM.
Reading the EPROM with the E6LAT bit set will give data that does not correspond to the actual
memory content. As interrupt vectors are in EPROM, they will not be loaded when E6LAT is set.
Similarly, the bootstrap ROM routines cannot be executed when E6LAT is set. In read mode, the
VPP6 pin must be at the V
set to the read mode.
Note:
E.3.2
Typically the EPROM will be programmed by the bootstrap routines resident in the on-chip ROM.
However, the user program can be used to program some EPROM locations if the proper
procedure is followed. In particular, the programming sequence must be running in RAM, as the
MC68HC05B6
Rev. 4.1
D-2). The t
OXOV
power-on. Failure to do so could result in permanent damage to the device. Unless
otherwise stated, EPROM programming is guaranteed at ambient (25°C) temperature
only.
An erased byte reads as $00.
or t
External clock
EPROM
EPROM read operation
EPROM program operation
ILCH
OXOV
.
or t
DD
DD
ILCH
voltage must be applied to the VPP6 pin at all times, including
level. When entering the STOP mode, the EPROM is automatically
specifications (see
MC68HC705B16
Figure
DD
.
Section
E-2. The device has a total of 15168 bytes
E.8) do not apply when using an
PP6
is controlled by one of the
Freescale
E-5
14

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