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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interrupt which is not latched); therefore, only one external interrupt pulse can be
latched during t
9.2.3.3
Timer interrupts
There are five different timer interrupt flags (ICF1, ICF2, OCF1, OCF2 and TOF) that will cause a
timer interrupt whenever they are set and enabled. These five interrupt flags are found in the five
most significant bits of the timer status register (TSR) at location $0013. ICF1 and ICF2 will vector
to the service routine defined by $1FF8-$1FF9, OCF1 and OCF2 will vector to the service routine
defined by $1FF6–$1FF7 and TOF will vector to the service routine defined by $1FF4–$1FF5 as
shown in
Figure
5.1.
There are three corresponding enable bits; ICIE for ICF1 and ICF2, OCIE for OCF1 and OCF2,
and TOIE for TOF. These enable bits are located in the timer control register (TCR) at address
$0012. See
Section 5.2.1
9.2.3.4
Serial communications interface (SCI) interrupts
There are five different interrupt flags (TDRE, TC, OR, RDRF and IDLE) that cause SCI interrupts
whenever they are set and enabled. These five interrupt flags are found in the five most significant
bits of the SCI status register (SCSR) at location $0010.
There are four corresponding enable bits: TIE for TDRE, TCIE for TC, RIE for OR and RDRF, and
ILIE for IDLE. These enable bits are located in the serial communications control register 2
(SCCR2) at address $000F. See
9
The SCI interrupt causes the program counter to vector to the address pointed to by memory
locations $1FF2 and $1FF3 which contain the starting address of the interrupt service routine.
Software in the SCI interrupt service routine must determine the priority and cause of the interrupt
by examining the interrupt flags and the status bits located in the serial communications status
register SCSR (address $0010).
The general sequence for clearing an interrupt is a software sequence of accessing the serial
communications status register while the flag is set followed by a read or write of an associated
register. Refer to
Section 6
Freescale
9-10
and serviced as soon as the I-bit is cleared.
ILIL
and
Section 5.2.2
for further information.
Section 6.11.3
and
Section
for a description of the SCI system and its interrupts.
RESETS AND INTERRUPTS
6.11.4.
MC68HC05B6
Rev. 4.1