MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 194

• 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: -

8.10 Analog Input Channels
8.11 Analog Subsystem
8-12
MOTOROLA
The number of available analog channels varies, depending on whether or not exter-
nal multiplexing is used. A maximum of 16 analog channels are supported by the in-
ternal multiplexing circuitry of the converter. Table 8-2 shows the total number of
analog input channels supported with zero to four external multiplexers.
The QADC analog subsystem includes a front-end analog multiplexer, a digital to an-
alog converter (DAC) array, a comparator, and a successive approximation register
(SAR).
The analog subsystem path runs from the input pins through the input multiplexing cir-
cuitry, into the DAC array, and through the analog comparator. The output of the com-
parator feeds into the SAR and is considered the boundary between the analog and
digital subsystems of the QADC.
Figure 8-4 shows a block diagram of the QADC analog submodule.
NOTES:
No External
Mux Chips
1. The above assumes that the external trigger inputs are shared with two analog input pins.
2. When external multiplexing is used, three input channels become multiplexed address out-
puts, and for each external multiplexer chip, one input channel becomes a multiplexed ana-
log input.
16
Directly Connected + External Multiplexed = Total Channels
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE
One External
12 + 8 = 20
Mux Chip
Number of Analog Input Channels Available
Table 8-2 Analog Input Channels
Two External
11 + 16 = 27
Mux Chips
Three External
10 + 24 = 34
Mux Chips
1, 2
Four External
Mux Chips
9 + 32 = 41
USER’S MANUAL
MC68336/376