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參數(shù)資料
型號: QADCRM
英文描述: Queued Analog-to-Digital Converter Reference Manual
中文描述: 排隊模擬到數(shù)字轉換器參考手冊
文件頁數(shù): 17/122頁
文件大小: 940K
代理商: QADCRM
QADC
REFERENCE MANUAL
SIGNAL DESCRIPTIONS
MOTOROLA
2-1
SECTION 2 SIGNAL DESCRIPTIONS
The QADC uses a maximum of 21 external pins. There are 16 channel/port pins that
can support up to 44 channels when external multiplexing is used (including internal
channels). All of the channel pins can also be used as general-purpose digital port
pins. In addition, there are also two analog reference pins, two analog submodule pow-
er pins, and one V
SSE
pin for the open drain output drivers on port A.
The QADC allows external trigger inputs and the multiplexer outputs to be combined
onto some of the channel pins. All of the channel pins are used for at least two func-
tions, depending on the modes in use.
The following paragraphs describe QADC pin functions.
QADC module pins.
Figure 2-1
displays the
Figure 2-1 QADC Input and Output Signals
QADC PINOUT
AN52/MA0/PQA0
AN53/MA1/PQA1
AN54/MA2/PQA2
AN55/ETRIG1/PQA3
AN56/ETRIG2/PQA4
AN57/PQA5
AN58/PQA6
AN59/PQA7
AN0/ANW/PQB0
AN1/ANX/PQB1
AN2/ANY/PQB2
AN3/ANZ/PQB3
AN48/PQB4
AN49/PQB5
AN50/PQB6
AN51/PQB7
DIGITAL RESULTS
AND CONTROL
ANALOG
CONVERTER
ANALOG
MULTIPLEXER
PORT A ANALOG
INPUTS, EXT TRIGGER
INPUTS, EXT MUX
ADDRESS OUTPUTS,
DIGITAL I/O
*
PORT B ANALOG
INPUTS, EXT MUX
INPUTS,
DIGITAL INPUTS
VSSE
VDDI
VSSA
VSSI
QADC
VDDA
VRH
VRL
OUTPUT DRIVER POWER
ANALOG REFERENCES
ANALOG POWER
INTERNAL DIGITAL POWER
(SHARED W/ OTHER MODULES)
P
*
P
*
PORT A PINS INCORPORATE OPEN DRAIN PULL DOWN DRIVERS.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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