MC9S12C64CFUE Freescale Semiconductor, MC9S12C64CFUE Datasheet - Page 234

• Manufacturer Part Number: MC9S12C64CFUE
• Description: IC MCU 64K FLASH 4K RAM 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12C64CFUE

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 60
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Processor Series: S12C
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 4 KB
• Interface Type: CAN/SCI/SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: M68EVB912C32EE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Package: 80PQFP
• Family Name: HCS12
• Maximum Speed: 25 MHz
• Operating Supply Voltage: 2.5|5 V
• Height: 2.4 mm
• Length: 14 mm
• Supply Voltage (max): 2.75 V, 5.5 V
• Supply Voltage (min): 2.35 V, 2.97 V
• Width: 14 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Chapter 8 Analog-to-Digital Converter (ATD10B8C) Block Description
8.3.2.5
This register selects the conversion clock frequency, the length of the second phase of the sample time and
the resolution of the A/D conversion (i.e.: 8-bits or 10-bits). Writes to this register will abort current
conversion sequence but will not start a new sequence.
Read: Anytime
Write: Anytime
234
Module Base + 0x0004
SMP[1:0]
PRS[4:0}
SRES8
Reset
Field
6–5
4–0
7
W
R
SRES8
A/D Resolution Select — This bit selects the resolution of A/D conversion results as either 8 or 10 bits. The A/D
converter has an accuracy of 10 bits; however, if low resolution is required, the conversion can be speeded up
by selecting 8-bit resolution.
0 10-bit resolution
1 8-bit resolution
Sample Time Select — These two bits select the length of the second phase of the sample time in units of ATD
conversion clock cycles. Note that the ATD conversion clock period is itself a function of the prescaler value (bits
PRS4-0). The sample time consists of two phases. The first phase is two ATD conversion clock cycles long and
transfers the sample quickly (via the buffer amplifier) onto the A/D machine’s storage node. The second phase
attaches the external analog signal directly to the storage node for final charging and high accuracy.
lists the lengths available for the second sample phase.
ATD Clock Prescaler — These 5 bits are the binary value prescaler value PRS. The ATD conversion clock
frequency is calculated as follows:
Note: The maximum ATD conversion clock frequency is half the Bus Clock. The default (after reset) prescaler
ATD Control Register 4 (ATDCTL4)
0
7
value is 5 which results in a default ATD conversion clock frequency that is Bus Clock divided by 12.
Table 8-8
ATDclock
SMP1
0
0
1
1
SMP1
0
6
illustrates the divide-by operation and the appropriate range of the Bus Clock.
=
Figure 8-7. ATD Control Register 4 (ATDCTL4)
[
----------------------------- -
BusClock
[
PRS
Table 8-6. ATDCTL4 Field Descriptions
SMP0
SMP0
MC9S12C-Family / MC9S12GC-Family
+
0
1
0
1
Table 8-7. Sample Time Select
0
1
5
]
]
×
0.5
PRS4
Rev 01.24
0
4
Length of 2nd Phase of Sample Time
Description
16 A/D conversion clock periods
2 A/D conversion clock periods
4 A/D conversion clock periods
8 A/D conversion clock periods
PRS3
0
3
PRS2
1
2
Freescale Semiconductor
PRS1
0
1
Table 8-7
PRS0
1
0