MC68HC908MR16CFU Freescale Semiconductor, MC68HC908MR16CFU Datasheet - Page 231

• Manufacturer Part Number: MC68HC908MR16CFU
• Description: IC MCU 8MHZ 16K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR16CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 44
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

TOVx — Toggle-On-Overflow Bit
CHxMAX — Channel x Maximum Duty Cycle Bit
Freescale Semiconductor
MSxB:MSxA
When channel x is an output compare channel, this read/write bit controls the behavior of the channel
x output when the TIMA counter overflows. When channel x is an input capture channel, TOVx has no
effect. Reset clears the TOVx bit.
When the TOVx is 1 and clear output on compare is selected, setting the CHxMAX bit forces the duty
cycle of buffered and unbuffered PWM signals to 100 percent. As
takes effect in the cycle after it is set or cleared. The output stays at 100 percent duty cycle level until
the cycle after CHxMAX is cleared.
1 = Channel x pin toggles on TIMA counter overflow.
0 = Channel x pin does not toggle on TIMA counter overflow.
X0
X1
1X
1X
1X
00
00
00
01
01
01
01
PTEx/TCHx
When TOVx is set, a TIMA counter overflow takes precedence over a
channel x output compare if both occur at the same time.
CHxMAX
TOVx
ELSxB:ELSxA
OVERFLOW
00
00
01
10
11
00
01
10
11
01
10
11
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Table 16-2. Mode, Edge, and Level Selection
COMPARE
PERIOD
OUTPUT
or buffered PWM
output compare
Output preset
Input capture
Figure 16-9. CHxMAX Latency
OVERFLOW
compare
Buffered
or PWM
Output
Mode
COMPARE
OUTPUT
NOTE
OVERFLOW
Pin under port control; initialize timer output level high
Pin under port control; initialize timer output level low
Capture on rising edge only
Capture on falling edge only
Capture on rising or falling edge
Software compare only
Toggle output on compare
Clear output on compare
Set output on compare
Toggle output on compare
Clear output on compare
Set output on compare
COMPARE
OUTPUT
OVERFLOW
Figure 16-9
Configuration
COMPARE
OUTPUT
OVERFLOW
shows, CHxMAX bit
I/O Registers
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