mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 183

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC912DG128 — Rev 3.0
MOTOROLA
PCLK
Figure 11-9. Clock Chain for MSCAN, SPI, ATD0, ATD1 and BDM
2
2
2
2
2
2
2
2
BITS: SPR2, SPR1, SPR0
REGISTER: SP0BR
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
0:0:0
COUNTER (PR0-PR4)
Freescale Semiconductor, Inc.
5-BIT MODULUS
For More Information On This Product,
SYSCLK
Go to: www.freescale.com
EXTALi
ECLK
BCLK
BIT RATE
SPI
Clock Functions
CLKSRC
SYNCHRONIZER
CLKSW
LOGIC
BKGD
PIN
2
BKGD DIRECTION
BKGD OUT
BKGD IN
and ATD1
TO ATD0
BDM BIT CLOCK:
Receive: Detect falling edge,
count 12 ECLKs, Sample input
Transmit 1: Detect falling edge,
count 6 ECLKs while output is
high impedance, Drive out 1 E
cycle pulse high, high imped-
ance output again
Transmit 0: Detect falling edge,
Drive out low, count 9 ECLKs,
Drive out 1 E cycle pulse high,
high impedance output
MSCAN
CLOCK
Clock Divider Chains
Clock Functions
Technical Data
183