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參數(shù)資料
| 型號： | ADCRM |
| 英文描述： | Analog-to-Digital Reference Manual |
| 中文描述： | 模擬到數(shù)字參考手冊 |
| 文件頁數(shù)： | 10/46頁 |
| 文件大?。?/td> | 415K |
| 代理商： | ADCRM |
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MOTOROLA
1-2
FUNCTIONAL OVERVIEW
ADC
REFERENCE MANUAL
Figure 1-1 ADC Block Diagram
1.3 General-Purpose I/O
In addition to use as multiplexer inputs, the eight analog inputs can be used as a gen-
eral-purpose digital input port (port ADA), provided signals are within logic level spec-
ification. Port ADB is a dedicated output port. A port data register (PDR) is used to
access data from these ports. Refer to
SECTION 2 SIGNAL DESCRIPTIONS
General-Purpose I/O
for more information on ports ADA and ADB.
and
3.3
1.4 Module Configuration
The ADC module configuration register (ADCMCR) controls the interaction between
the ADC and other modules. Low-power stop mode and freeze mode are ADC oper-
ating modes associated with assertion of IMB signals by other microcontroller modules
SAR
RC DAC ARRAY
AND
COMPARATOR
ANALOG
MUX
AND SAMPLE
BUFFER AMP
CLK SELECT/
PRESCALE
AN6/PADA6
AN5/PADA5
AN4/PADA4
AN3/PADA3
AN2/PADA2
AN1/PADA1
AN0/PADA0
VRH
VRL
REFERENCE
VDDA
VSSA
SUPPLY
ADC BUS
INTERFACE UNIT
INTERMODULE BUS (IMB)
RESERVED
RESERVED
RESERVED
RESERVED
VRH
VRL
(VRH–VRL)/2
RESERVED
PORT ADA DATA
REGISTER
MODE
AND
TIMING
CONTROL
INTERNAL
CONNECTIONS
RESULT 7
RESULT 6
RESULT 5
RESULT 4
RESULT 3
RESULT 2
RESULT 1
RESULT 0
PADB6
PADB5
PADB4
PADB3
PADB2
PADB1
PADB0
AN7/PADA7
PADB7
PORT ADB
DATA
REGISTER
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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