参数资料
型号: T89C51AC2-SLSIM
厂商: Atmel
文件页数: 108/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
标准包装: 27
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
87
A/T89C51AC2
4127H–8051–02/08
Figure 45. ADC Description
Figure 46 shows the timing diagram of a complete conversion. For simplicity, the figure
depicts the waveforms in idealized form and do not provide precise timing information.
For ADC characteristics and timing parameters refer to the Section “AC Characteristics”
of the A/T89C51AC2 datasheet.
Figure 46. Timing Diagram
Notes:
1. Tsetup min, see the AC Parameter for A/D conversion.
2. Tconv = 11 clock ADC = 1sample and hold + 10 bit conversion
The user must ensure that Tsetup time between setting ADEN and the start of the first conversion.
Rai
AN0/P1.0
AN1/P1.1
AN2/P1.2
AN3/P1.3
AN4/P1.4
AN5/P1.5
AN6/P1.6
AN7/P1.7
000
001
010
011
100
101
110
111
SCH2
ADCON.2
SCH0
ADCON.0
SCH1
ADCON.1
ADC
CLOCK
ADEN
ADCON.5
ADSST
ADCON.3
ADEOC
ADCON.4
ADC
Interrupt
Request
EADC
IEN1.1
CONTROL
AVSS
Sample and Hold
ADDH
VAREF
R/2R DAC
VAGND
8
10
+
-
ADDL
2
SAR
ADCIN
Cai
ADEN
ADSST
ADEOC
T
SETUP
(1)
T
CONV
(2)
CLK
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