MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 474
MMC2114
Manufacturer Part Number
MMC2114
Description
M CORE Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MMC2114.pdf
(654 pages)
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Queued Analog-to-Digital Converter (QADC)
19.9.3 Analog Subsystem
19.9.3.1 Analog-to-Digital Converter Operation
Advance Information
474
PQA4
PQA0
PQB3
PQB0
V
V
V
V
DDA
SSA
RH
RL
Figure 19-19. QADC Analog Subsystem Block Diagram
10-BIT A/D CONVERTER
ANALOG
POWER
This section describes the QADC analog subsystem, which includes the
front-end analog multiplexer and analog-to-digital converter.
The analog subsystem consists of the path from the input pins to the A/D
converter block. Signals from the queue control logic are fed to the
multiplexer and state machine. The end-of-conversion (EOC) signal and
the Successive Approximation Register (SAR) reflect the result of the
conversion.
subsystem.
10-BIT RC
Freescale Semiconductor, Inc.
DAC
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
16
COMPAR-
CHAN. DECODE & MUX
ATOR
SAMPLE
BUFFER
Figure 19-19
Go to: www.freescale.com
16:1
INPUT
C
SAMP
10
APPROXIMATION
shows a block diagram of the QADC analog
INTERNAL
CHANNEL
DECODE
SUCCESSIVE
STATE MACHINE & LOGIC
4
REGISTER
10
6
SAR TIMING
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
BIAS CIRCUIT
POWER-
DOWN
10
2
SAR[9:0]
CHAN[5:0]
STOP
RST
QCLK
IST
START CONV
END OF CONV
MOTOROLA
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