MC68HC705B16CFN

Manufacturer Part NumberMC68HC705B16CFN
DescriptionIC MCU 2.1MHZ 15K OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC05
MC68HC705B16CFN datasheet
 


Specifications of MC68HC705B16CFN

Core ProcessorHC05Core Size8-Bit
Speed2.1MHzConnectivitySCI
PeripheralsPOR, WDTNumber Of I /o32
Program Memory Size15KB (15K x 8)Program Memory TypeOTP
Eeprom Size256 x 8Ram Size352 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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C.2
EPROM
The MC68HC705B5 has a total of 6206 bytes of EPROM, 256 bytes being reserved for the
EPROM1 array (see
Figure
C-2). The EPP bit (EPROM protect) is not operative on the EPROM1
array, making it possible to program it after the main EPROM has been programmed and
protected. The reset and interrupt vectors are located at $1FF2-$1FFF and the EPROM control
register described in
Section C.3.1
The EPROM array is supplied by the VPP6 pin in both read and programming modes. Typically
the user’s software will be loaded in a programming board where VPP6 is controlled by one of the
bootstrap loader routines (bootloader mode). It will then be placed in an application where no
programming occurs (user mode). In this case the VPP6 pin should be hardwired to V
An erased EPROM byte reads as $00.
Warning: A minimum V
voltage must be applied to the VPP6 pin at all times, including
DD
power-on, as a lower voltage could damage the device. Unless otherwise stated,
EPROM programming is guaranteed at ambient (25°C) temperature only
C.2.1
EPROM programming operation
The User program can be used to program some EPROM locations, provided the proper
procedure is followed. In particular, the programming sequence must be running in RAM, as the
EPROM will not be available for code execution while the ELAT bit is set. The VPP6 switching must
occur externally, after the EPGM bit is set, for example, under the control of a signal generated on
a pin by the programming routine.
Note:
Unless the part has a window for reprogramming, only the cumulative programming of
bits to logic 1 is possible if multiple programming is made on the same byte.
To allow simultaneous programming of up to 4 bytes, they must be in the same group of addresses
which share the same most significant address bits; only the two LSBs can change.
MC68HC05B6
Rev. 4.1
is located at address $0007.
MC68HC705B5
.
DD
14
Freescale
C-5