參數資料
型號: ADUC845BSZ62-5-RL
廠商: Analog Devices Inc
文件頁數: 58/108頁
文件大小: 0K
描述: IC FLASH MCU W/24BIT ADC 52MQFP
標準包裝: 800
系列: MicroConverter® ADuC8xx
核心處理器: 8052
芯體尺寸: 8-位
速度: 12.58MHz
連通性: I²C,SPI,UART/USART
外圍設備: POR,PSM,PWM,溫度傳感器,WDT
輸入/輸出數: 34
程序存儲器容量: 62KB(62K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量: 2.25K x 8
電壓 - 電源 (Vcc/Vdd): 4.75 V ~ 5.25 V
數據轉換器: A/D 10x24b; D/A 1x12b,2x16b
振蕩器型: 內部
工作溫度: -40°C ~ 125°C
封裝/外殼: 52-QFP
包裝: 帶卷 (TR)
Data Sheet
ADuC845/ADuC847/ADuC848
Rev. C | Page 53 of 108
DAC CIRCUIT INFORMATION
The ADuC845/ADuC847/ADuC848 incorporate a 12-bit,
voltage output DAC on-chip. It has a rail-to-rail voltage output
buffer capable of driving 10 k/100 pF, and has two selectable
ranges, 0 V to VREF and 0 V to AVDD. It can operate in 12-bit or
8-bit mode. The DAC has a control register, DACCON, and two
data registers, DACH/L. The DAC output can be programmed
to appear at Pin 14 (DAC) or Pin 13 (AINCOM).
In 12-bit mode, the DAC voltage output is updated as soon as
the DACL data SFR is written; therefore, the DAC data registers
should be updated as DACH first, followed by DACL. The 12-
bit DAC data should be written into DACH/L right-justified
such that DACL contains the lower 8 bits, and the lower nibble
of DACH contains the upper 4 bits.
DACCON Control Register
SFR Address:
FDH
Power-On Default:
00H
Bit Addressable:
No
Table 33. DACCON—DAC Configuration Commands
Bit No.
Name
Description
7
–––
Not Implemented. Write Don’t Care.
6
–––
Not Implemented. Write Don’t Care.
5
–––
Not Implemented. Write Don’t Care.
4
DACPIN
DAC Output Pin Select.
Set to 1 by the user to direct the DAC output to Pin 13 (AINCOM).
Cleared to 0 by the user to direct the DAC output to Pin 14 (DAC).
3
DAC8
DAC 8-Bit Mode Bit.
Set to 1 by the user to enable 8-bit DAC operation. In this mode, the 8 bits in DACL SFR are routed to the 8 MSBs
of the DAC, and the 4 LSBs of the DAC are set to 0.
Cleared to 0 by the user to enable 12-bit DAC operation. In this mode, the 8 LSBs of the result are routed to
DACL, and the upper 4 MSB bits are routed to the lower 4 bits of DACH.
2
DACRN
DAC Output Range Bit.
Set to 1 by the user to configure the DAC range of 0 V to AVDD.
Cleared to 0 by the user to configure the DAC range of 0 V to 2.5 V (VREF).
1
DACCLR
DAC Clear Bit.
Set to 1 by the user to enable normal DAC operation.
Cleared to 0 by the user to reset the DAC data registers DACL/H to 0.
0
DACEN
DAC Enable Bit.
Set to 1 by the user to enable normal DAC operation.
Cleared to 0 by the user to power down the DAC.
DACH/DACL Data Registers
These DAC data registers are written to by the user to update
the DAC output.
SFR Address:
DACL (DAC data low byte)—FBH
DACH (DAC data high byte)—FCH
Power-On Default:
00H (both registers)
Bit Addressable:
No (both registers)
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