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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9.1.5
Functions affected by reset
When processing stops within the MCU for any reason, i.e. power-on reset, external reset or the
execution of a STOP or WAIT instruction, various internal functions of the MCU are affected.
Table 9-1
shows the resulting action of any type of system reset, but not necessarily in the order
in which they occur.
Table 9-1 Effect of RESET, POR, STOP and WAIT
Function/effect
Timer prescaler set to zero
Timer counter set to $FFFC
All timer enable bits cleared (disable)
Data direction registers cleared (inputs)
Stack pointer set to $00FF
Force internal address bus to restart
Vector $1FFE, $1FFF
Interrupt mask bit (I-bit CCR) set to 1
Interrupt mask bit (I-bit CCR) cleared
Set interrupt enable bit (INTE)
Set POR bit in miscellaneous register
Reset STOP latch
Reset IRQ latch
Reset WAIT latch
SCI disabled
SCI status bits cleared (except TDRE and TC)
SCI interrupt enable bits cleared
SCI status bits TDRE and TC set
Oscillator disabled for 4064 cycles
Timer clock cleared
SCI clock cleared
A/D disabled
SM bit in the miscellaneous register cleared
Watchdog counter reset
WDOG bit in the miscellaneous register reset
EEPROM control bits (see
MC68HC05B6
Rev. 4.1
RESET
POR
x
x
x
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x
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x
x
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x
x
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x
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x
x
x
x
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x
x
x
x
x
Section
3.5.1)
x
x
x = Described action takes place
– = Described action does not take place
RESETS AND INTERRUPTS
WAIT
STOP
x
x
x
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x
x
x
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x
x
x
Freescale
9-5
9