MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 121

• 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

10.8 Clock Divider Chains
Figure
peripherals:
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
SCI — Serial peripheral interface
BDLC — Byte data link communications
RTI — Real-time interrupt
COP — Computer operating properly
TIM — Standard timer module
ECT — Enhanced capture timer
SPI — Serial peripheral interface
ATD — Analog-to-digital converter
BDM — Background debug mode
10-10,
÷
2
4
÷
1, 2, 3, 4, 5, 6, ..., 8190, 8191
Figure
MODULUS DIVIDER:
BAUD RATE (16x)
BAUD RATE (1x)
TRANSMIT
RECEIVE
SC0BD
SCI0
SCI0
10-11,
Figure 10-10. Clock Chain for SCI, BDLC, RTI, and COP
Figure
BITS: R1, R0
REGISTER: BCR1
÷
10-12, and
2
M68HC12B Family Data Sheet, Rev. 9.1
2
÷
÷
÷
2
2
2
BIT: RTBYP
REGISTER: RTICTL
0:0
0:1
1:0
1:1
Figure 10-13
BITS: RTR2, RTR1, AND RTR0
REGISTER: RTICTL
÷
TO BDLC
2
11
÷
÷
÷
÷
÷
÷
summarize the clock divider chains for these
2
2
2
2
2
2
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
0:0:0
TO RTI
REGISTER: COPCTL
BITS: CR2, CR1, AND CR0
÷
÷
÷
÷
÷
÷
4
4
4
4
2
2
Clock Divider Chains
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
0:0:0
TO COP
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