ADS1247与ADS1248的寄存器列表
| ADDRESS | REGISTER | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| 00h | MUX0 | BCS1 | BCS0 | MUX_SP2 | MUX_SP1 | MUX_SP0 | MUX_SN2 | MUX_SN1 | MUX_SN0 |
| 01h | VBIAS | VBIAS7 | VBIAS6 | VBIAS5 | VBIAS4 | VBIAS3 | VBIAS2 | VBIAS1 | VBIAS0 |
| 02h | MUX1 | CLKSTAT | VREFCON1 | VREFCON0 | REFSELT1 | REFSELT0 | MUXCAL2 | MUXCAL1 | MUXCAL0 |
| 03h | SYS0 | 0 | PGA2 | PGA1 | PGA0 | DR3 | DR2 | DR1 | DR0 |
| 04h | OFC0 | OFC7 | OFC6 | OFC5 | OFC4 | OFC3 | OFC2 | OFC1 | OFC0 |
| 05h | OFC1 | OFC15 | OFC14 | OFC13 | OFC12 | OFC11 | OFC10 | OFC9 | OFC8 |
| 06h | OFC2 | OFC23 | OFC22 | OFC21 | OFC20 | OFC19 | OFC18 | OFC17 | OFC16 |
| 07h | FSC0 | FSC7 | FSC6 | FSC5 | FSC4 | FSC3 | FSC2 | FSC1 | FSC0 |
| 08h | FSC1 | FSC15 | FSC14 | FSC13 | FSC12 | FSC11 | FSC10 | FSC9 | FSC8 |
| 09h | FSC2 | FSC23 | FSC22 | FSC21 | FSC20 | FSC19 | FSC18 | FSC17 | FSC16 |
|
0Ah |
IDAC0 |
ID3 |
ID2 |
ID1 |
ID0 | DRDY MODE |
IMAG2 |
IMAG1 |
IMAG0 |
| 0Bh | IDAC1 | I1DIR3 | I1DIR2 | I1DIR1 | I1DIR0 | I2DIR3 | I2DIR2 | I2DIR1 | I2DIR0 |
| 0Ch | GPIOCFG | IOCFG7 | IOCFG6 | IOCFG5 | IOCFG4 | IOCFG3 | IOCFG2 | IOCFG1 | IOCFG0 |
| 0Dh | GPIODIR | IODIR7 | IODIR6 | IODIR5 | IODIR4 | IODIR3 | IODIR2 | IODIR1 | IODIR0 |
| 0Eh | GPIODAT | IODAT7 | IODAT6 | IODAT5 | IODAT4 | IODAT3 | IODAT2 | IODAT1 | IODAT0 |
ADS1247 and ADS1248 寄存器定义
MUX0多路控制开关0。此寄存器可以任意组合的差分输入选择的任何输入通道。请注意&＃xff0c;此设置可以通过muxcal和VBIAS位取代。
| MUX0 地址00H RESET VALUE &＃61; 01h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| BCS1 | BCS0 | MUX_SP2 | MUX_SP1 | MUX_SP0 | MUX_SN2 | MUX_SN1 | MUX_SN0 |
Bits 7:6 BCS1:0 电流源电流大小设置
00 &＃61;关闭电流源&＃xff08;默认&＃xff09;
01 &＃61; 0.5uA
10 &＃61; 2uA
11 &＃61; 10uA
Bits 5:3 MUX_SP2:0 正输入通道选择
000 &＃61; AIN0 (default)
001 &＃61; AIN1
010 &＃61; AIN2
011 &＃61; AIN3
100 &＃61; AIN4 (ADS1248only)
101 &＃61; AIN5 (ADS1248only)
110 &＃61; AIN6 (ADS1248only)
111 &＃61; AIN7 (ADS1248only)
Bits 2:0 MUX_SN2:0 负输入通道选择
000 &＃61; AIN0
001 &＃61; AIN1 (default)
010 &＃61; AIN2
011 &＃61; AIN3
100 &＃61; AIN4 (ADS1248only)
101 &＃61; AIN5 (ADS1248only)
110 &＃61; AIN6 (ADS1248only)
111 &＃61; AIN7 (ADS1248only)
VBIAS—偏执电压设置寄存器
| VBIAS – 地址 01h RESET VALUE &＃61; 00h | ||||||||
| DEVICE | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ADS1248 | VBIAS7 | VBIAS6 | VBIAS5 | VBIAS4 | VBIAS3 | VBIAS2 | VBIAS1 | VBIAS0 |
| ADS1247 | 0 | 0 | 0 | 0 | VBIAS3 | VBIAS2 | VBIAS1 | VBIAS0 |
Bits 7:0 VBIAS7:0 设置偏压(AVDD &＃43; AVSS)/2到选择的模拟输入
0 &＃61; 关闭偏执电压 (default)
1 &＃61; 开启偏执电压到对应的输入 (bit 0 对应到AIN0,依次类推.).
MUX1—多路开关控制器1
| MUX1 - ADDRESS 02h RESET VALUE &＃61; 00h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| CLKSTAT | VREFCON1 | VREFCON0 | REFSELT1 | REFSELT0 | MUXCAL2 | MUXCAL1 | MUXCAL0 |
Bit 7 CLKSTAT 此位为只读&＃xff0c;并表示内部或外部振荡器是否正在使用。
0 &＃61; 内部时钟正在使用
1 &＃61; 外部时钟正在使用
Bits 6:5 VREFCON1:0 控制内部电压基准。这些位允许引用完全打开或关闭&＃xff0c;或允许引用状态跟随设备的状态。注意内部参考为IDAC功能操作要求。
00 &＃61;关闭基准fault)
01 &＃61; 一直开启基准
10 or 11 &＃61;转换完成后或关机操作后关闭基准&＃xff08;跟随相关状态自动开启或关闭&＃xff09;
Bits 4:3 REFSELT1:0 ADC参考选择
00 &＃61;使用REF0作为基准输入(default)
01 &＃61;使用REF1作为基准输入(只支持ADS1248)
10 &＃61;选择内部基准
11 &＃61;在内部连接到参考选择REF0输入对&＃xff08;不知道干嘛的&＃xff09;
Bits 2:0 MUXCAL2:0这些位用于选择一个测量方式&＃xff08;选择的测量方式将取代MUX_SP, MUX_SN, and VBIAS&＃xff09;
000 &＃61;正常运行 (default)
001 &＃61;偏移测量
010 &＃61;增益测量
011 &＃61;内部温度测量
100 &＃61; 外部 REF1 测量(ADS1248 only)
101 &＃61; 外部REF0测量
110 &＃61; AVDD 测量
111 &＃61; DVDD 测量
MUXCAL 设置
| MUXCAL[2:0] | PGA GAIN 设置 | ADC INPUT |
| 000 | 通过SYS0设置 | 正常模式 |
| 001 | 通过SYS0设置 | 输入接到 (AVDD &＃43; AVSS)/2 |
| 010 | 强制设置为1 1 | VREFP – VREFN (full-scale) |
| 011 | 强制设置为1 | 内部温度测量 |
| 100 | 强制设置为1 | (VREFP1 – VREFN1)/4 |
| 101 | 强制设置为1 | (VREFP0 – VREFN0)/4 |
| 110 | 强制设置为1 | (AVDD – AVSS)/4 |
| 111 | 强制设置为1 | (DVDD – DVSS)/4 |
设置会修改PGA&＃xff0c;恢复正常模式后PGA由SYS0控制
SYS0—系统控制寄存器 0
| SYS0 - ADDRESS 03h RESET VALUE &＃61; 00h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| 0 | PGA2 | PGA1 | PGA0 | DOR3 | DOR2 | DOR1 | DOR0 |
Bit 7 必须一直为 &＃39;0&＃39;
Bits 6:4 PGA2:0 PGA增益设置
000 &＃61; 1 (default)
001 &＃61; 2
010 &＃61; 4
011 &＃61; 8
100 &＃61; 16
101 &＃61; 32
110 &＃61; 64
111 &＃61; 128
Bits 3:0 DOR3:0 ADC采集速率设置 最大设置为1001&＃xff0c;选择2000sps
0000 &＃61; 5SPS (default)
0001 &＃61; 10SPS
0010 &＃61; 20SPS
0011 &＃61; 40SPS
0100 &＃61; 80SPS
0101 &＃61; 160SPS
0110 &＃61; 320SPS
0111 &＃61; 640SPS
1000 &＃61; 1000SPS
1001 to 1111 &＃61; 2000SPS
OFC23:0 ADS1248偏移校准系数寄存器.
OFC0—偏移校正系数寄存器0
| OFC0 - ADDRESS 04h RESET VALUE &＃61; 000000h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| OFC7 | OFC6 | OFC5 | OFC4 | OFC3 | OFC2 | OFC1 | OFC0 |
OFC1—偏移校正系数寄存器1
| OFC1 - ADDRESS 05h RESET VALUE &＃61; 000000h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| OFC15 | OFC14 | OFC13 | OFC12 | OFC11 | OFC10 | OFC9 | OFC8 |
OFC2—偏移校正系数寄存器2
| OFC2 - ADDRESS 06h RESET VALUE &＃61; 000000h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| OFC23 | OFC22 | OFC21 | OFC20 | OFC19 | OFC18 | OFC17 | OFC16 |
FSC23:0 满量程校准系数寄存器&＃xff08;复位后恢复出厂校准值&＃xff09;.
FSC0—满量程校准寄存器0
| FSC0 - ADDRESS 07h RESET VALUE IS PGA DEPENDENT (1) | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| FSC7 | FSC6 | FSC5 | FSC4 | FSC3 | FSC2 | FSC1 | FSC0 |
FSC1—满量程校准寄存器1
| FSC1 - ADDRESS 08h RESET VALUE IS PGA DEPENDENT (1) | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| FSC15 | FSC14 | FSC13 | FSC12 | FSC11 | FSC10 | FSC9 | FSC8 |
FSC2—满量程校准寄存器2
| FSC2 - ADDRESS 09h RESET VALUE IS PGA DEPENDENT (1) | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| FSC23 | FSC22 | FSC21 | FSC20 | FSC19 | FSC18 | FSC17 | FSC16 |
IDAC0 可编程电流源控制寄存器 0
| IDAC0 - ADDRESS 0Ah RESET VALUE &＃61; x0h | |||||||
| BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ID3 | ID2 | ID1 | ID0 | DRDY MODE | IMAG2 | IMAG1 | IMAG0 |
Bits 7:4 ID3:0
只读只读&＃xff0c;工厂编程位&＃xff0c;用于识别修改版本。
Bit 3 DRDY MODE 用于设置DOUT/DRDY输出数据准备就绪状态&＃xff0c;低电平有效
0 &＃61; DOUT/DRDY仅作为数据输出(default)
1 &＃61; DOUT/DRDY引脚功能既作为数据输出和数据准备&＃xff0c;低电平有效
Bits 2:0 IMAG2:0 ADS1247/8有两个可编程电流源DAC可用于传感器激励。这几位控制激励电流的大小。IDAC要求内部基准源必须开启.
000 &＃61; off (default)
001 &＃61; 50uA
010 &＃61; 100uA
011 &＃61; 250uA
100 &＃61; 500uA
101 &＃61; 750uA
110 &＃61; 1000uA
111 &＃61; 1500uA
IDAC1 可编程电流源控制寄存器1
| IDAC1 - ADDRESS 0Bh RESET VALUE &＃61; FFh | ||||||||
| DEVICE | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ADS1248 | I1DIR3 | I1DIR2 | I1DIR1 | I1DIR0 | I2DIR3 | I2DIR2 | I2DIR1 | I2DIR0 |
| ADS1247 | 0 | 0 | I1DIR1 | I1DIR0 | 0 | 0 | I2DIR1 | I2DIR0 |
ADS1247/8有2路IDAC&＃xff0c;可以连接到IEXC1&＃xff0c;IEXC2或任意模拟输入。
Bits 7:4 I1DIR3:0 这些位选择第一电流源DAC输出引脚。
0000 &＃61; AIN0
0001 &＃61; AIN1
0010 &＃61; AIN2
0011 &＃61; AIN3
0100 &＃61; AIN4 (ADS1248only)
0101 &＃61; AIN5 (ADS1248only)
0110 &＃61; AIN6 (ADS1248only)
0111 &＃61; AIN7 (ADS1248only)
10x0 &＃61; IEXT1 (ADS1248only)
10x1 &＃61; IEXT2 (ADS1248only)
11xx &＃61; 关闭(default)
Bits 3:0 I2DIR3:0 这些位选择了第二电流源DAC的输出引脚
0000 &＃61; AIN0
0001 &＃61; AIN1
0010 &＃61; AIN2
0011 &＃61; AIN3
0100 &＃61; AIN4 (ADS1248only)
0101 &＃61; AIN5 (ADS1248only)
0110 &＃61; AIN6 (ADS1248only)
0111 &＃61; AIN7 (ADS1248only)
10x0 &＃61; IEXT1 (ADS1248only)
10x1 &＃61; IEXT2 (ADS1248only)
11xx &＃61; 关闭(default)
GPIOCFG—GPIO 配置寄存器&＃xff0c;用于配置GPIO与模拟输入引脚复用功能
GPIO0 复用 REFP0
GPIO1 复用 REFN0
GPIO2 复用 AIN2
GPIO3 复用 AIN3
GPIO4复用 AIN4 (ADS1248)
GPIO5复用 AIN5 (ADS1248)
GPIO6复用 AIN6 (ADS1248)
GPIO7复用 AIN7 (ADS1248)
| GPIOCFG - ADDRESS 0Ch RESET VALUE &＃61; 00h | ||||||||
| DEVICE | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ADS1248 | IOCFG7 | IOCFG6 | IOCFG5 | IOCFG4 | IOCFG3 | IOCFG2 | IOCFG1 | IOCFG0 |
| ADS1247 | 0 | 0 | 0 | 0 | IOCFG3 | IOCFG2 | IOCFG1 | IOCFG0 |
Bits 7:0 IOCFG7:0 GPIO与模拟输入复用设置&＃xff0c;注意ADS1248支持所有GPIO&＃xff0c;但是ADS1247只支持GPIO1-GPIO3&＃xff0c;也就是BIT0-BIT3
0 &＃61; 该引脚用作模拟输入(default)
1 &＃61; 该引脚用作 GPIO pin
GPIODIR—GPIO方向寄存器
| GPIODIR - ADDRESS 0Dh RESET VALUE &＃61; 00h | ||||||||
| DEVICE | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ADS1248 | IODIR7 | IODIR6 | IODIR5 | IODIR4 | IODIR3 | IODIR2 | IODIR1 | IODIR0 |
| ADS1247 | 0 | 0 | 0 | 0 | IODIR3 | IODIR2 | IODIR1 | IODIR0 |
Bits 7:0 IODIR7:0 用于控制GPIO方向&＃xff0c;注意ADS1248支持所有GPIO&＃xff0c;但是ADS1247只支持GPIO1-GPIO3&＃xff0c;也就是BIT0-BIT3
0 &＃61; GPIO输出模式 (default)
1 &＃61; GPIO 输入模式
GPIODAT—GPIO数据寄存器
| GPIODAT - ADDRESS 0Eh RESET VALUE &＃61; 00h | ||||||||
| DEVICE | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
| ADS1248 | IODAT7 | IODAT6 | IODAT5 | IODAT4 | IODAT3 | IODAT2 | IODAT1 | IODAT0 |
| ADS1247 | 0 | 0 | 0 | 0 | IODAT3 | IODAT2 | IODAT1 | IODAT0 |
Bits 7:0 IODAT7:0 如果对应GPIO设置为输出&＃xff0c;则写入对应bit会输出到相应引脚&＃xff0c;如果对应GPIO设置为输入&＃xff0c;则读取对应bit对应输入值&＃xff0c;注意ADS1248支持所有GPIO&＃xff0c;但是ADS1247只支持GPIO1-GPIO3&＃xff0c;也就是BIT0-BIT3
SPI 命令
一些指令是独立的命令&＃xff08;例如&＃xff0c;复位&＃xff09;&＃xff0c;而另一些则需要额外的字节&＃xff08;例如&＃xff0c;写命令需要计数和数据字节&＃xff09;
操作数说明:
n &＃61;读写寄存器的数量(要读取的字节 – 1)
r &＃61; 寄存器 (0 to 15)
x &＃61; 不关心
SPI 命令列表
| COMMAND TYPE | COMMAND | DESCRIPTION | 1st COMMAND BYTE | 2nd COMMAND BYTE |
|
System Control | WAKEUP | 退出睡眠模式 | 0000 000x (00h, 01h) |
|
| SLEEP | 进入睡眠模式 | 0000 001x (02h, 03h) |
| |
| SYNC | 同步AD转换 | 0000 010x (04h, 05h) | 0000-010x (04,05h) | |
| RESET | 复位 | 0000 011x (06h, 07h) |
| |
| NOP | 空指令 | 1111 1111 (FFh) |
| |
|
Data Read | RDATA | 读取数据 | 0001 001x (12h, 13h) |
|
| RDATAC | 连续读取数据 | 0001 010x (14h, 15h) |
| |
| SDATAC | 停止读取数据 | 0001 011x (16h, 17h) |
| |
| Read Register | RREG | 读寄存器 rrrr | 0010 rrrr (2xh) | 0000_nnnn |
| Write Register | WREG | 写寄存器rrrr | 0100 rrrr (4xh) | 0000_nnnn |
|
Calibration | SYSOCAL | 系统失调校准 | 0110 0000 (60h) |
|
| SYSGCAL | 系统增益校准 | 0110 0001 (61h) |
| |
| SELFOCAL | 自校正 | 0110 0010 (62h) |
|
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