ZHCS146C December 2011 – April 2020 ADS1291 , ADS1292 , ADS1292R
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 EMI Filter
- 8.3.2
Input Multiplexer
- 8.3.2.1 Device Noise Measurements
- 8.3.2.2 Test Signals (TestP and TestN)
- 8.3.2.3 Auxiliary Differential Input (RESP_MODN/IN3N, RESP_MODN/IN3P)
- 8.3.2.4 Temperature Sensor (TEMPP, TEMPN)
- 8.3.2.5 Supply Measurements (MVDDP, MVDDN)
- 8.3.2.6 Lead-Off Excitation Signals (LoffP, LoffN)
- 8.3.2.7 Auxiliary Single-Ended Input
- 8.3.3 Analog Input
- 8.3.4 PGA Settings and Input Range
- 8.3.5 Digital Decimation Filter
- 8.3.6 Reference
- 8.3.7 Clock
- 8.3.8 Data Format
- 8.3.9 Multiple Device Configuration
- 8.3.10 ECG-Specific Functions
- 8.3.11 Setting the Device for Basic Data Capture
- 8.4 Device Functional Modes
- 8.5
Programming
- 8.5.1 SPI Interface
- 8.5.2
SPI Command Definitions
- 8.5.2.1 WAKEUP: Exit STANDBY Mode
- 8.5.2.2 STANDBY: Enter STANDBY Mode
- 8.5.2.3 RESET: Reset Registers to Default Values
- 8.5.2.4 START: Start Conversions
- 8.5.2.5 STOP: Stop Conversions
- 8.5.2.6 OFFSETCAL: Channel Offset Calibration
- 8.5.2.7 RDATAC: Read Data Continuous
- 8.5.2.8 SDATAC: Stop Read Data Continuous
- 8.5.2.9 RDATA: Read Data
- 8.5.2.10 Sending Multi-Byte Commands
- 8.5.2.11 RREG: Read From Register
- 8.5.2.12 WREG: Write to Register
- 8.6
Register Maps
- 8.6.1
User Register Description
- 8.6.1.1 ID: ID Control Register (Factory-Programmed, Read-Only) (address = 00h)
- 8.6.1.2 CONFIG1: Configuration Register 1 (address = 01h)
- 8.6.1.3 CONFIG2: Configuration Register 2 (address = 02h)
- 8.6.1.4 LOFF: Lead-Off Control Register (address = 03h)
- 8.6.1.5 CH1SET: Channel 1 Settings (address = 04h)
- 8.6.1.6 CH2SET: Channel 2 Settings (address = 05h)
- 8.6.1.7 RLD_SENS: Right Leg Drive Sense Selection (address = 06h)
- 8.6.1.8 LOFF_SENS: Lead-Off Sense Selection (address = 07h)
- 8.6.1.9 LOFF_STAT: Lead-Off Status (address = 08h)
- 8.6.1.10 RESP1: Respiration Control Register 1 (address = 09h)
- 8.6.1.11 RESP2: Respiration Control Register 2 (address = 0Ah)
- 8.6.1.12 GPIO: General-Purpose I/O Register (address = 0Bh)
- 8.6.1
User Register Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息
8.5.1.7 GPIO
The ADS1291, ADS1292, and ADS1292R have a total of two general-purpose digital input/output (GPIO) pins available in the normal mode of operation. The digital I/O pins are individually configurable as either inputs or as outputs through the GPIOC bits register. The GPIOD bits in the GPIO register control the level of the pins. When reading the GPIOD bits, the data returned are the logic level of the pins, whether they are programmed as inputs or outputs. When the GPIO pin is configured as an input, a write to the corresponding GPIOD bit has no effect. When configured as an output, a write to the GPIOD bit sets the output value.
If configured as inputs, these pins must be driven (do not float). The GPIO pins are set as inputs after power-on or after a reset. Figure 47 shows the GPIO port structure. The pins should be shorted to DGND with a series resistor if not used.
Figure 47. GPIO Port Pin