MC68HC908GP32CP Freescale Semiconductor, MC68HC908GP32CP Datasheet - Page 338

• Manufacturer Part Number: MC68HC908GP32CP
• Description: IC MCU 8MHZ 32K FLASH 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• For Use With: M68EVB908GP32 - BOARD EVALUATION FOR HC908GP32
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Timebase Module (TBM)
21.4 Functional Description
Technical Data
336
CGMXCLK
÷ 2
NOTE:
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
This module is designed for a 32.768-kHz oscillator.
This module can generate a periodic interrupt by dividing the crystal
frequency, CGMXCLK. The counter is initialized to all 0s when TBON bit
is cleared. The counter, shown in
TBON bit is set. When the counter overflows at the tap selected by
TBR2:TBR0, the TBIF bit gets set. If the TBIE bit is set, an interrupt
request is sent to the CPU. The TBIF flag is cleared by writing a 1 to the
TACK bit. The first time the TBIF flag is set after enabling the timebase
module, the interrupt is generated at approximately half of the overflow
period. Subsequent events occur at the exact period.
÷ 2
Figure 21-1. Timebase Block Diagram
÷ 8
÷ 2048
÷ 2
÷ 2
÷ 16
÷ 2
÷ 2
Timebase Module (TBM)
÷ 8192
÷ 32
÷ 2
÷ 2
÷ 2
÷ 64
÷ 2
÷ 32768
MC68HC908GP32
÷ 128
Figure
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
SEL
21-1, starts counting when the
TBON
•
MC68HC08GP32
R
TBIF
TBMINT
MOTOROLA
—
Rev. 6
TBIE