ST10F296 datasheet(180/346 Pages) STMICROELECTRONICS

180 / 346 page

Obsolete

Product(s)

- Obsolete

Product(s)

Analog-to-digital converter (ADC)

ST10F296E

180/346

14.3

XTimer module

The XTimer module is a 16-bit up/down counter with a 4-bit exponential scaler dedicated to

the channel injection mode of the ADC. This mode injects channel into a running sequence

without disturbing it. The PEC stores the conversion results in the memory without entering

and exiting interrupt routines for each data transfer.

A channel injection can be triggered by an event on the capture/compare CC31 (Port P7.7)

of the CAPCOM2 unit by externally connecting the dedicated output XADCINJ of the XTimer

to the input P7.7/CC31. The ADC exclusively converts Port 5 or XPort 10 inputs. If one ‘y’

channel has to be used continuously in injection mode, it must be externally connected by

hardware to Port5.y and XPort10.y inputs.

The XTimer peripheral is enabled by setting the XPEN bit of the SYSCON register and bit

10 of the XPERCON register.

14.3.1

Main features

Main features include:

–

16-bit linear timer with 4-bit exponential prescaler

–

Counting between 16-bit ‘start value’ and 16-bit ‘end value’

–

Counting period between four cycles and 233 cycles (62.5 ns and 134 s using 64

MHz CPU clock)

–

1 trigger output (XADCINJ)

Programmable functions include:

–

Up/down counting

–

Reload enable

–

Continue/stop modes

Figure 63.

XTimer block diagram

Exponential

XB_CLK

XTCR

XTSVR

XTEVR

XTCVR

XBus interface

= +1 -1

XADCINJ

scaler

XADCINJ

Data bus

Obsolete

Product(s)

- Obsolete

Product(s)

ST10F296 датащи(PDF) 180 Page - STMicroelectronics

ST10F296 датащи(HTML) 180 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL