XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 399

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

23.11 Clock System
MC68HC908AZ60A — Rev 2.0
MOTOROLA
CGM
MSCAN08
OSC
÷ 2
After timer n has been programmed to capture rising edge events, it can
be used under software control to generate 16-bit time stamps which can
be stored with the received message.
Figure 23-7
circuitry and its interaction with the clock generation module (CGM).
With this flexible clocking scheme the MSCAN08 is able to handle CAN
bus rates ranging from 10 kbps up to 1 Mbps.
The clock source bit (CLKSRC) in the MSCAN08 module control register
(CMCR1) (see
defines whether the MSCAN08 is connected to the output of the crystal
oscillator or to the PLL output.
CGMXCLK
Figure 23-7. Clocking Scheme
PLL
MSCAN Controller (MSCAN08)
CLKSRC
shows the structure of the MSCAN08 clock generation
MSCAN08 Module Control Register 0
÷ 2
÷ 2
PRESCALER
(1 .. 64)
BCS
(2 * BUS FREQ.)
MSCAN Controller (MSCAN08)
on page 411)
MSCANCLK
CGMOUT
Technical Data
(TO SIM)
Clock System
399