ST20-GP1 datasheet(3/116 Pages) STMICROELECTRONICS

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ST20-GP1

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9.4

MemWait .............................................................................................................................................. 56

9.5

EMI configuration registers .................................................................................................................. 58

9.6

Reset and bootstrap behavior .............................................................................................................. 59

10 Clocks and low power controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.1

Clocks .................................................................................................................................................. 61

10.2

Low power control ................................................................................................................................ 61

10.3

Low power configuration registers ....................................................................................................... 63

10.4

Clocking sources ................................................................................................................................. 65

11 System services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

11.1

Reset, initialization and debug ............................................................................................................. 67

11.2

Bootstrap ............................................................................................................................................. 68

12 Serial link interface (OS-Link) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

12.1

OS-Link protocol .................................................................................................................................. 70

12.2

OS-Link speed ..................................................................................................................................... 70

12.3

OS-Link connections ............................................................................................................................ 71

13 UART interface (ASC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

13.1

Asynchronous serial controller operation ............................................................................................. 73

13.2

Hardware error detection capabilities .................................................................................................. 76

13.3

Baud rate generation ........................................................................................................................... 76

13.4

Interrupt control .................................................................................................................................... 77

13.5

ASC configuration registers ................................................................................................................. 79

14 Parallel input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

14.1

PIO Port ............................................................................................................................................... 85

15 Byte-wide parallel port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

15.1

EMI mode operation ............................................................................................................................ 88

15.2

Parallel link (DMA) mode operation ..................................................................................................... 88

15.3

Configuration registers ......................................................................................................................... 88

15.4

External data transfer protocols ........................................................................................................... 89

16 Configuration register addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

17 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

18 GPS Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

18.1

Accuracy ............................................................................................................................................ 100

18.2

Time to first fix ................................................................................................................................... 101

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