ST20-GP6 datasheet(3/123 Pages) STMICROELECTRONICS

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ST20-GP6

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10 Programmable memory interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

10.1

EMI signal descriptions ......................................................................................................................... 58

10.2

External accesses ................................................................................................................................. 59

10.3

MemWait ............................................................................................................................................... 60

10.4

EMI configuration registers ................................................................................................................... 62

10.5

Boot source ........................................................................................................................................... 65

10.6

Default configuration ............................................................................................................................. 65

11 Low power controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

11.1

Low power control ................................................................................................................................. 66

11.2

Low power configuration registers ........................................................................................................ 67

12 Real time clock and watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

12.1

Power supplies ..................................................................................................................................... 70

12.2

Real time clock ..................................................................................................................................... 70

12.3

Watchdog timer ..................................................................................................................................... 70

12.4

RTC/WDT configuration registers ......................................................................................................... 71

13 System services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

13.1

Reset, initialization and debug .............................................................................................................. 73

13.2

Bootstrap .............................................................................................................................................. 73

13.3

Clocks ................................................................................................................................................... 73

14 Diagnostic controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

14.1

Diagnostic hardware ............................................................................................................................. 75

14.2

Access features .................................................................................................................................... 76

14.3

Software debugging features ................................................................................................................ 77

14.4

Controlling the diagnostic controller ...................................................................................................... 79

14.5

Peeking and poking the host from the target ........................................................................................ 80

14.6

Abortable instructions ........................................................................................................................... 80

15 UART interface (ASC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

15.1

Functionality .......................................................................................................................................... 82

15.2

Timeout mechanism ............................................................................................................................. 85

15.3

Baud rate generation ............................................................................................................................ 85

15.4

Interrupt control .................................................................................................................................... 86

15.5

ASC configuration registers .................................................................................................................. 88

16 Parallel input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

16.1

PIO Ports0-1 ......................................................................................................................................... 94

17 Configuration register addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

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