MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 62

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

62
MOTOROLA
PORT T7
PCLK
PCLK
PAEN
2
2
2
2
2
2
2
2
2
2
2
2
2
2
TEN
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
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
REGISTER: TMSK2
BITS: PR2, PR1, PR0
COUNTER (PR0-PR4)
5-BIT MODULUS
LOGIC
Figure 14 Clock Chain for SPI, ATD and BDM
GATE
PAMOD
Figure 13 Clock Chain for TIM
BIT RATE
SPI
SYNCHRONIZER
PACLK
ECLK
LOGIC
BKGD
PIN
2
BKGD DIRECTION
PULSE ACC
LOW BYTE
BKGD OUT
BKGD IN
PULSE ACC
HIGH BYTE
TO ATD
BDM BIT CLOCK:
Receive: Detect falling edge,
count 12 E clocks, Sample input
Transmit 1: Detect falling edge,
count 6 E clocks 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 E clocks,
drive out 1 E cycle pulse high,
high impedance output
PACLK/256
PACLK/65536
(PAOV)
REGISTER: PACTL
BITS: PAEN, CLK1, CLK0
MC68HC912B32TS/D
1:0:1
1:1:1
0:x:x
1:0:0
1:1:0
HC12 CLOCK CHAIN SPI ATD BDM
MC68HC912B32
COUNTER
TO TIM
HC12 CLOCK CHAIN TIM