MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 196

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

8.11.1.1 Amplifier Bypass Mode Conversion Timing
8-14
MOTOROLA
QCLK
Figure 8-5 illustrates the timing for conversions. This diagram assumes a final
sampling period of two QCLKs.
If the amplifier bypass mode is enabled for a conversion by setting the amplifier bypass
(BYP) bit in the CCW, the timing changes to that shown in Figure 8-6. The initial sam-
ple time and the transfer time are eliminated, reducing the potential conversion time
by six QCLKs. However, due to internal RC effects, a minimum final sample time of
four QCLKs must be allowed. This results in a savings of four QCLKs. When using the
bypass mode, the external circuit should be of low source impedance, typically less
than 10 k . Also, the loading effects of the external circuitry by the QADC need to be
considered, since the benefits of the sample amplifier are not present.
2 CYCLES
SAMPLE
INITIAL
TIME
SAMPLE AND TRANSFER
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE
TRANSFER
4 CYCLES
TIME
TIME
Figure 8-5 Conversion Timing
FINAL SAMPLE
N CYCLES:
(2, 4, 8, 16)
TIME
SUCCESSIVE APPROXIMATION RESOLUTION
SEQUENCE
RESOLUTION
10 CYCLES
TIME
USER’S MANUAL
MC68336/376
QADC CONVERSION TIM