XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 119

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

10.1 Introduction
10.2 Block Diagram
M68HC12B Family — Rev. 8.0
MOTOROLA
Data Sheet — M68HC12B Family
EXTAL
XTAL
NOTE:
CONSUMPTION
OSCILLATOR
REDUCED
÷
2
OSCILLATOR
OUT
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:
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.
•
•
•
Clock selection and generation circuitry
Slow-mode clock divider
Reset and stop generation timing and control
E AND P CLOCK
GENERATOR
GENERATOR
T CLOCK
Figure 10-1. CGM Block Diagram
Clock Generation Module (CGM)
CLOCK DIVIDER
Section 10. Clock Generation Module (CGM)
SLOW MODE
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
Data Sheet
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