參數(shù)資料
型號(hào)： SE370C777AJNT
元件分類： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁(yè)數(shù)： 24/48頁(yè)
文件大?。?/td> 711K
代理商： SE370C777AJNT
TMS370Cx36
8-BIT MICROCONTROLLER
SPNS039B – JANUARY 1996 – REVISED FEBRUARY 1997
24
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
analog-to-digital converter 1 module
The analog-to-digital converter 1 (ADC1) module is an 8-bit, successive approximation converter with internal
sample-and-hold circuitry. The module has four multiplexed analog input channels that allow the processor to
convert the voltage levels from up to eight different sources. The ADC1 module features include the following:
Minimum conversion time: 32.8
μ
s at 5-MHz SYSCLK
Ten external pins:
–
Eight analog-input channels (AN0–AN7), any of which can be software-configured as digital inputs
(E0–E7) when not needed as analog channels
–
AN1–AN7 also can be configured as positive-input voltage reference.
–
V
CC3
: ADC1 module high-voltage reference input
V
SS3
: ADC1 module low-voltage reference input
The ADDATA register, which contains the digital result of the last ADC1 conversion.
–
ADC1 operations can be accomplished through either interrupt-driven or polled algorithms.
Six ADC1 module control registers located in the control-register frame beginning at address 1070h
The ADC1 module control registers are listed in Table 15.
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á
ááááááááááááááááááááááááááá
á
P072
á
á
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P07E
á
BIT 7
á
P07D
Port E Input Enable Register
AD
BIT 6
BIT 5
SELECT2
BIT 4
áááá
BIT 3
REF VOLT
SELECT0
BIT 2
áááá
BIT 1
AD INPUT
SELECT1
BIT 0
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REG
ADDATA
ADENA
áá
P070
PF
á
áá
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áá
áá
P07C
áá
—
á
áá
—
á
áá
á
áá
ADCTL
CONVERT
á
áá
á
ááá
REF VOLT
á
ááá
REF VOLT
á
ááá
AD INPUT
á
á
á
ADIN
áá
á
áá
P073
á
á
Port E Data Input Register
áá
P07F
AD STEST
AD ESPEN
—
P071
á
—
á
ááá
á
—
á
ááá
á
—
á
ááá
FLAG
á
áá
ENA
á
áá
áá
á
ADSTAT
to
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á
á
á
á
áá
á
—
ááá
á
—
áá
á
—
ááá
á
á
ADPRI
á
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