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參數(shù)資料
| 型號： | P87C557E8 |
| 廠商： | NXP Semiconductors N.V. |
| 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 |
| 文件頁數(shù)： | 22/84頁 |
| 文件大?。?/td> | 322K |
| 代理商： | P87C557E8 |
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1999 Mar 12
22
Philips Semiconductors
Product specification
8-bit microcontroller
P8xC557E8
11.8
ADC Special Function Registers
Table 14
ADC Special Function Registers overview
The SFRs are not bit addressable. For more information on Special Function Registers refer to Section 8.2.
11.8.1
ADC R
ESULT
R
EGISTERS
The binary result code of the analog-to-digital conversions is accessed by the ADC Result Registers:
ADRSLn (ADRSL0 to ADRSL7); eight input channel related conversion result SFRs for the 8 result lower bytes. Each
of ADRSLn is associated with the indexed analog input channel ADCn (ADC0/P5.0 to ADC7/P5.7).
ADRSH for the ADC; one general SFR for the 2 result upper bits (bit 9 and 8).
During read (by software) of the ADRSLn register, simultaneously the two highest bits of the 10-bit conversion result are
copied into the two latches, ADRSH.0 and ADRSH.1 (SFR ADRSH) preserving them until the next read of any ADRSLn
register. Thus to ensure that the 10-bit result of the same single analog-to-digital conversion is captured, first read the
ADRSLn register and then the ADRSH register.
Table 15
ADC Result Register Low Byte; ADRSLn; n = 0 to 7 (address see 86H to F6H)
Table 16
Description of ADRSLn bits
ADDRESS
NAME
R/W
RESET
VALUE
DESCRIPTION
86H
96H
A6H
B6H
C6H
D6H
E6H
F6H
F7H
ADRSL0
ADRSL1
ADRSL2
ADRSL3
ADRSL4
ADRSL5
ADRSL6
ADRSL7
ADRSH
R
ADC Result Registers Low Byte: ADRSL0 to ADRSL7
; The read value
after reset is indeterminate. Their data are not affected by chip reset.
R
00H
ADC Result Register High Bits
: one common result SFR for the upper
2 result bits.
ADC Input Port Scan-Select Register
. Contains control bits to select the
analog input channel(s) to be scanned for analog-to-digital conversion.
ADC Control Register
. Contains control and status bits for the
analog-to-digital converter peripheral block.
Digital Input Port Register
; shared with analog inputs. P5 is not affected by
chip reset.
E7H
ADPSS
R/W
00H
D7H
ADCON
R/W
00H
C7H
P5
R
7
6
5
4
3
2
1
0
ADRSn.7
ADRSn.6
ADRSn.5
ADRSn.4
ADRSn.3
ADRSn.2
ADRSn.1
ADRSn.0
BIT
SYMBOL
DESCRIPTION
7 to 0
ADRSn.7 to ADRSn.0
ADC result lower byte.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| P87C557E8EFB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| P87C557E8EFB/01,55 | 功能描述:8位微控制器 -MCU 8B MICROCONTROLLER RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| P87C557E8EFB/01,557 | 制造商:NXP Semiconductors 功能描述: |
| P87C575EBA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| P87C575EBAA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer |
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