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参数资料
| 型号： | SM1230E868 |
| 厂商： | Semtech |
| 文件页数： | 16/46页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL XMITTER FOR SX1230 |
| 设计资源： | SM1230 BOM SX1230 Eval Board Schematic |
| 标准包装： | 1 |
| 类型： | 发射器 |
| 频率： | 868MHz |
| 适用于相关产品： | SX1230 |
| 已供物品： | 板 |
| 产品目录页面： | 584 (CN2011-ZH PDF) |
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SX1230
Integrated Transmitter IC
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
option for no debouncing is also available. Note that time constants are process and temperature dependent and may vary
by +/- 15%.
0x4D + PB_MAPPING(PB(3:0)) * section size(5:0)
Pb ‘1111’
0x4D + PB_MAPPING(PB(3:0)) * section size(5:0)
Pb ‘0010’
section size(5:0)
Pb ‘0001’
0x4D
0x4C
Config
Registers
0x00
Figure 6. Memory Mapping in Stand Alone Mode
The table below gives the push button mappings for the determination of E 2 PROM memory locations. Note that the
combinations PB[3:0] = ‘0001’, ‘0010’, ‘0100’ and ‘1000’ are mapped to the four lowest locations in memory. This mapping
allows the use of a simple four button interface with the minimum memory size.
Table 9
Push Button Combination to E 2 PROM Memory Location Mapping
PB[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
PB_MAPPING(3:0)
None (no active push-button)
0
1
4
2
5
6
10
PB[3:0]
1000
1001
1010
1011
1100
1101
1110
1111
PB_MAPPING(3:0)
3
7
8
11
9
12
13
14 / Low Battery
The commands in the E 2 PROM are written as instructions thus bit 7 is set high - equivalent to adding 0x80 to the register
address to be programmed. As was shown in Figure 6, the first 77 bytes are used for configuration. Note that registers only
require programming if they hold a value other than the default value (see table 11 for default register settings).
SX1230, Revision 2 May 2009
?2008 Semtech Corp.
Page 16
www.semtech.com
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