MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 113

• Manufacturer Part Number: MC68HC912B32CFU8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC68HC912B32CFU8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Chapter 10
Clock Generation Module (CGM)
10.1 Introduction
The clock generation module (CGM) generates the system clocks and generates and controls the timing
of the reset and power-on reset (POR) logic. The CGM is composed of:
10.2 Block Diagram
Freescale Semiconductor
•
•
•
Clock selection and generation circuitry
Slow-mode clock divider
Reset and stop generation timing and control
EXTAL
XTAL
Older device mask sets do not support the slow-mode clock divider feature.
Register $00E0 is reserved in older devices and provides no function.
Mask sets that do not have the slow-mode clock divider feature on the
MC68HC912B32 include: G96P, G86W, and H91F.
Mask sets that do not have the slow-mode clock divider feature on the
MC68HC12BE32 include: H54T and J38M.
Mask sets that do not have the slow-mode clock divider feature on the
MC68HC(9)12BC32 include: J15G.
CONSUMPTION
OSCILLATOR
REDUCED
÷
2
OSCILLATOR
OUT
E AND P CLOCK
GENERATOR
GENERATOR
T CLOCK
Figure 10-1. CGM Block Diagram
M68HC12B Family Data Sheet, Rev. 9.1
CLOCK DIVIDER
SLOW MODE
NOTE
SLOW E CLOCK
SLOW P CLOCK
P CLOCK (GBT)
E CLOCK (GBT)
WAIT
T CLOCK
P CLOCK
E CLOCK
TO BDLC AND TIM
TO BUSES, BDM,
SPI, SCI, ATD, RTI,
COP, PWM, FEE,
EE, RAM
TO CPU
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