MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 95
MC68HC705V12CFN
Manufacturer Part Number
MC68HC705V12CFN
Description
The Motorola microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705V12CFN.pdf
(248 pages)
- Current page: 95 of 248
- Download datasheet (2Mb)
MC68HC705V12
MOTOROLA
NOTE:
—
Rev. 3.0
register first addresses the most significant byte (MSB) ($18, $1A), the
LSB ($19, $1B) is transferred to a buffer. This buffer value remains fixed
after the first MSB read, even if the user reads the MSB several times.
This buffer is accessed when reading the free-running counter or
counter alternate register LSB ($19 or $1B) and, thus, completes a read
sequence of the total counter value. In reading either the free-running
counter or counter alternate register, if the MSB is read, the LSB also
must be read to complete the sequence.
The counter alternate register differs from the counter register in one
respect: A read of the counter register MSB can clear the timer overflow
flag (TOF). Therefore, the counter alternate register can be read at any
time without the possibility of missing timer overflow interrupts due to
clearing of the TOF.
The free-running counter is configured to $FFFC during reset and is a
read-only register only when the timer is enabled. During a power-on
reset, the counter also is preset to $FFFC and begins running only after
the TON bit in the timer control register is set. Because the free-running
counter is 16 bits preceded by a fixed divided-by-four prescaler, the
value in the free-running counter repeats every 262,144 internal bus
clock cycles. When the counter rolls over from $FFFF to $0000, the TOF
bit is set. When counter roll-over occurs, an interrupt also can be
enabled by setting its interrupt enable bit (TOIE).
To ensure that an interrupt does not occur, the I bit in the CCR should
be set while manipulating both the high and low byte registers of a
specific timer function.
16-Bit Timer
Timer Counter Registers $18 $19 and $1A $1B
Advance Information
16-Bit Timer
95
Related parts for MC68HC705V12CFN
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
HCMOS Microcontroller Unit
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
6367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
MC1494LMotorola, Inc [MONOLITHIC FOUR-QUADRANT MULTIPLIER]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC1466LMotorola, Inc [PRECISION WIDE RANGE VOLTAGE AND CURRENT REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC145532DWMotorola, Inc [ADPCM Transcoder]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Silicon Controlled Rectifiers
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF Power Field Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTORS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
LATERAL N-CHANNEL BROADBAND RF POWER MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF LOW POWER TRANSISTOR NPN SILICON
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
PLASTIC SURFACE MOUNT ZENER DIODES 1.5 WATTS 3.3-68 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
OVERVOLTAGE TRANSIENT SUPPRESSOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET 15 AMPERES 60 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet: