MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 111

• Manufacturer Part Number: MC812A4CPVE8
• Description: IC MCU 16BIT EEPROM 4K 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC812A4CPVE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 83
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: EEPROM
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Processor Series: HC812A
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 91
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Controller Family/series: 68HC12
• No. Of I/o's: 91
• Eeprom Memory Size: 4KB
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Chapter 11
Phase-Lock Loop (PLL)
11.1 Introduction
The phase-lock loop (PLL) allows slight adjustments in the frequency of the MCU. The smallest increment
of adjustment is ± 9.6 kHz to the output frequency (F
(OSCXTAL) and a reference divider set to 1750.
clock module and
11.2 Block Diagram
Freescale Semiconductor
TO MODULES
XTAL PIN
MCLK
Figure 11-2
MODULE CLOCK
OSCILLATOR
MCS[B:A]
DIVIDER
TO MPU
provides a register map.
EXTAL PIN
Figure 11-1. PLL Block Diagram
MC68HC812A4 Data Sheet, Rev. 7
TO CPU
OUT-OF-LOCK
REFERENCE
DETECTOR
RDV[11:0]
DIVIDER
LCKF
ECLK
PCLK
TCLK
Figure 11-1
Out
f
ECLK & PCLK
GENERATOR
GENERATOR
Reference
) rate assuming an input clock of 16.8 MHz
TCLK
shows the PLL dividers and a portion of the
DETECTOR
SYSCLK
LDV[11:0]
DIVIDER
PHASE
LOOP
f
Loop
SEE
LOOP FILTER
PLLON
÷ 2
Table 11-1
UP
DOWN
PLLS
C
R
S
BASE CLOCK
S
BCS[C:B:A]
DIVIDER
V
MUX
DDPLL
CHARGE
PUMP
VCO
MUXCLK
XFC
PIN
C
P
111