参数资料
型号: AD8803ARZ
厂商: Analog Devices Inc
文件页数: 5/16页
文件大小: 0K
描述: IC DAC 8BIT OCTAL W/SD 16-SOIC
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 48
系列: TrimDAC®
设置时间: 600ns
位数: 8
数据接口: 串行
转换器数目: 8
电压电源: 单电源
功率耗散(最大): 27.5mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 管件
输出数目和类型: 8 电压,单极
采样率(每秒): 1.7M
产品目录页面: 785 (CN2011-ZH PDF)
AD8801/AD8803
REV. A
–13–
*
* AD8801/AD8803 to M68HC11 Interface Assembly Program
*
* M68HC11 Register definitions
*
PORTC
EQU
$1003
Port C control register
*
“0,0,0,0;0,0,RS/, SHDN/”
DDRC
EQU
$1007
Port C data direction
PORTD
EQU
$1008
Port D data register
*
“0,0,/CS,CLK;SDI,0,0,0”
DDRD
EQU
$1009
Port D data direction
SPCR
EQU
$1028
SPI control register
*
“SPIE,SPE,DWOM,MSTR;CPOL,CPHA,SPR1,SPR0”
SPSR
EQU
$1029
SPI status register
*
“SPIF,WCOL,0,MODF;0,0,0,0”
SPDR
EQU
$102A
SPI data register; Read-Buffer; Write-Shifter
*
* SDI RAM variables:
SDI1 is encoded from 0 (Hex) to 7 (Hex)
*
SDI2 is encoded from 00 (Hex) to FF (Hex)
*
AD8801/3 requires two 8-bit loads; upper 5 bits
*
of SDI1 are ignored. AD8801/3 address bits in last
*
three LSBs of SDI1.
*
SDI1
EQU
$00
SDI packed byte 1 “0,0,0,0;0,A2,A1,A0”
SDI2
EQU
$01
SDI packed byte 2 “DB7,DB6,DB5,DB4;DB3,DB2,DB1,DB0”
*
* Main Program
*
ORG
$C000
Start of user’s RAM in EVB
INIT
LDS
#$CFFF
Top of C page RAM
*
* Initialize Port C Outputs
*
LDAA
#$03
0,0,0,0;0,0,1,1
*
/RS-Hi, /SHDN-Hi
STAA
PORTC
Initialize Port C Outputs
LDAA
#$03
0,0,0,0;0,0,1,1
STAA
DDRC
/RS and /SHDN are now enabled as outputs
*
* Initialize Port D Outputs
*
LDAA
#$20
0,0,1,0;0,0,0,0
*
/CS-Hi,/CLK-Lo,SDI-Lo
STAA
PORTD
Initialize Port D Outputs
LDAA
#$38
0,0,1,1;1,0,0,0
STAA
DDRD
/CS,CLK, and SDI are now enabled as outputs
*
* Initialize SPI Interface
*
LDAA
#$53
STAA
SPCR
SPI is Master,CPHA=0,CPOL=0,Clk rate=E/32
*
* Call update subroutine
*
BSR
UPDATE
Xfer 2 8-bit words to AD8402
JMP
$E000
Restart BUFFALO
*
* Subroutine UPDATE
*
UPDATE
PSHX
Save registers X, Y, and A
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