MC68HC908MR8CP Freescale Semiconductor, MC68HC908MR8CP Datasheet - Page 244

• Manufacturer Part Number: MC68HC908MR8CP
• Description: IC MCU 8K FLASH 8MHZ PWM 28-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR8CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 12
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Timer Interface B (TIMB)
Technical Data
244
NOTE:
ELSxB and ELSxA — Edge/Level Select Bits
Before enabling a TIMB channel register for input capture operation,
make sure that the PTBx/TBCHx pin is stable for at least two bus clocks.
When channel x is an input capture channel, these read/write bits
control the active edge-sensing logic on channel x.
When channel x is an output compare channel, ELSxB and ELSxA
control the channel x output behavior when an output compare
occurs.
When ELSxB and ELSxA are both clear, channel x is not connected
to port B, and pin PTBx/TCHxB is available as a general-purpose I/O
pin. However, channel x is at a state determined by these bits and
becomes transparent to the respective pin when PWM, input capture,
or output compare mode is enabled.
and ELSxA work. Reset clears the ELSxB and ELSxA bits.
MSxB:MSxA
X0
X1
00
00
00
01
01
01
1X
1X
1X
Table 12-2. Mode, Edge, and Level Selection
Timer Interface B (TIMB)
ELSxB:ELSxA
00
00
01
10
11
01
10
11
01
10
11
compare
compare
Buffered
or PWM
buffered
capture
Output
Output
preset
output
Mode
PWM
Input
or
Table 12-2
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
Toggle output on compare
Clear output on compare
Set output on compare
Toggle output on compare
Clear output on compare
Set output on compare
MC68HC908MR8 — Rev 4.1
Configuration
Freescale Semiconductor
shows how ELSxA