MC68HC908AB32CFU Freescale Semiconductor, MC68HC908AB32CFU Datasheet - Page 209

• Manufacturer Part Number: MC68HC908AB32CFU
• Description: IC MCU 8MHZ 32K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AB32CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

12.9 I/O Signals
12.9.1 TIMB Clock Pin
12.9.2 TIMB Channel I/O Pins
MC68HC908AB32
Freescale Semiconductor
—
Rev. 1.1
Port F shares four pins with the TIMB and port D shares one.
PTD4/TBCLK is an external clock input to the TIMB prescaler. The four
TIMB channel I/O pins are PTF4/TBCH0, PTF5/TBCH1, PTF2/TBCH2,
and PTF3/TBCH3.
PTD4/TBCLK is an external clock input that can be the clock source for
the TIMB counter instead of the prescaled internal bus clock. Select the
PTD4/TBCLK input by writing logic 1s to the three prescaler select bits,
PS[2:0]. See
TBCLK pulse width, TBCLK
The maximum TBCLK frequency is:
PTD4/TBCLK is available as a general-purpose I/O pin when not used
as the TIMB clock input. When the PTD4/TBCLK pin is the TIMB clock
input, it is an input regardless of the state of the DDRD6 bit in data
direction register D.
Each channel I/O pin is programmable independently as an input
capture pin or an output compare pin. PTF2/TBCH2 and PTF5/TBCH1
can be configured as buffered output compare or buffered PWM pins.
Timer Interface Module B (TIMB)
12.10.1 TIMB Status and Control
------------------------------------ -
bus frequency
bus frequency ÷ 2
LMIN
1
or TBCLK
+
t
HMIN
SU
Timer Interface Module B (TIMB)
Register. The minimum
, is:
Technical Data
209