MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 109

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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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9.1.5
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
in which they occur.
MC68HC05B6
Rev. 4.1
shows the resulting action of any type of system reset, but not necessarily in the order
Functions affected by reset
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
Table 9-1 Effect of RESET, POR, STOP and WAIT
Function/effect
RESETS AND INTERRUPTS
Section
3.5.1)
x = Described action takes place
– = Described action does not take place
RESET
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
POR
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
WAIT
x
x
STOP
x
x
x
x
x
x
x
x
x
Freescale
9-5
9

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