参数资料
型号: XBIB-R
厂商: Digi International/Maxstream
文件页数: 12/72页
文件大小: 1116K
描述: BOARD RS232 ZIGBEE MOD PRO
设计资源: XBIB-R Schematic
标准包装: 1
附件类型: 接口板
适用于相关产品: XBee 和 XBee Pro 收音机
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Chapter??燫F燤odule燨peration
2.2. ADC and Digital I/O Line Support
The XBee/XBee-PRO RF Modules support ADC (Analog-to-digital conversion) and digital I/O line
passing. The following pins support multiple functions:
To enable ADC and DIO pin functions:
2.2.1. I/O Data Format
I/O data begins with a header. The first byte of the header defines the number of samples forth-
coming. A sample is comprised of input data and the inputs can contain either DIO or ADC. The
last 2 bytes of the header (Channel Indicator) define which inputs are active. Each bit represents
either a DIO line or ADC channel.
Figure?04.  Header
Sample data follows the header and the channel indicator frame is used to determine how to read
the sample data. If any of the DIO lines are enabled, the first 2 bytes are the DIO data and the
ADC data follows. ADC channel data is stored as an unsigned 10-bit value right-justified on a 16-
bit boundary.
Figure?05.  Sample燚ata
Table?01.   Pin爁unctions燼nd爐heir燼ssociated爌in爊umbers燼nd燾ommands 
AD?燗nalogtoDigital燙onverter,燚IO?燚igital營nput/Output
Pin爁unctions爊ot燼pplicable爐o爐his爏ection燼re燿enoted爓ithin?parenthesis).
Pin Function
Pin#
AT Command
AD0 / DIO0
20
D0
AD1 / DIO1
19
D1
AD2 / DIO2
18
D2
AD3 / DIO3 / (COORD_SEL)
17
D3
AD4 / DIO4
11
D4
AD5 / DIO5 / (ASSOCIATE)
15
D5
DIO6 / (RTS)
16
D6
DIO7 / (CTS)
12
D7
DI8 / (DTR) / (Sleep_RQ)
9
D8
For ADC Support:
Set ATDn = 2
For Digital Input support:
Set ATDn = 3
For Digital Output Low support:
Set ATDn = 4
For Digital Output High support:
Set ATDn = 5
Header
Bit set to 1 if channel is active
Bytes 2 - 3 (Channel Indicator)
na
D8
A0
A1
A2
A3
A4
A5
D7
D0
D1
D2
D3
D4
D5
D6
Byte 1
Total number of samples
bit 15
bit 0
Sample Data
DIO Line Data is first (if enabled)
ADC Line Data
ADCn MSB
ADCn LSB
7
0
1
2
3
4
5
6
X
8
X
X
X
X
X
X
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