MC68HC908GR8CDW Freescale Semiconductor, MC68HC908GR8CDW Datasheet - Page 332

• Manufacturer Part Number: MC68HC908GR8CDW
• Description: IC MCU 8K FLASH 8MHZ 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GR8CDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 17
• Program Memory Size: 7.5KB (7.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Timebase Module (TBM)
21.6 Interrupts
Technical Data
332
NOTE:
Do not change TBR2–TBR0 bits while the timebase is enabled
(TBON = 1).
TACK— Timebase ACKnowledge
TBIE — Timebase Interrupt Enabled
TBON — Timebase Enabled
The timebase module can interrupt the CPU on a regular basis with a
rate defined by TBR2:TBR0. When the timebase counter chain rolls
over, the TBIF flag is set. If the TBIE bit is set, enabling the timebase
interrupt, the counter chain overflow will generate a CPU interrupt
request.
Interrupts must be acknowledged by writing a logic 1 to the TACK bit.
Freescale Semiconductor, Inc.
The TACK bit is a write-only bit and always reads as 0. Writing a logic
1 to this bit clears TBIF, the timebase interrupt flag bit. Writing a logic
0 to this bit has no effect.
This read/write bit enables the timebase interrupt when the TBIF bit
becomes set. Reset clears the TBIE bit.
This read/write bit enables the timebase. Timebase may be turned off
to reduce power consumption when its function is not necessary. The
counter can be initialized by clearing and then setting this bit. Reset
clears the TBON bit.
For More Information On This Product,
1 = Clear timebase interrupt flag
0 = No effect
1 = Timebase interrupt enabled
0 = Timebase interrupt disabled
1 = Timebase enabled
0 = Timebase disabled and the counter initialized to 0s
Go to: www.freescale.com
Timebase Module (TBM)
MC68HC908GR8 — Rev 4.0
MOTOROLA