T410 datasheet(53/84 Pages) STMICROELECTRONICS

53 / 84 page

ST52T410/ST52T420/E420

53/84

Figure 10.2 Timer 0 External START/STOP Mode

NOTE: The external clock signal applied on the

T0CLK pin must have a frequency at least two

times smaller than the internal master clock.

The prescaler output can be selected by setting the

PRESCx bit of REG_CONF6, REG_CONF9 and

REG_CONF11 registers (see Table 10.2, Table

10.5 and Table 10.7).

REMARK: The first period of the TxOUT signal

is one clock cycle shorter.

TxRES resets the content of the 8-bit counter x to

zero. It is generated by the TIRSTx and TxMSK

bits of REG_CONF5, REG_CONF7, REG_CONF8

and REG_CONF10 registers (see Table 10.1,

Table 10.3, Table 10.4 and Table 10.6).

TxSTRT signal starts/stops Timer x counting only

if the peripherals are configured in Timer mode.

This signal is forced by setting the correspondent

TISTRx bit of REG_CONF5, REG_CONF8 and

REG_CONF10 registers (see Table 10.1, Table

10.4 and Table 10.6).

TxMSK bits mask the reset of each timer and can

be utilized to synchronize a simultaneous start of

the timers by means (for example), of the following

procedure, which starts three timers:

1) TIRST0 = TIRST1 = TIRST2 = 0,

2) TISTR0 = TISTR1 = TISTR2 = 0,

3) T0MSK = T1MSK = T2MSK = 1,

4) TIRST0 = TIRST1 = TIRST2 = 1,

5) TISTR0 = TISTR1 = TISTR2 = 1,

6) T0MSK = T1MSK = T2MSK = 0,

When TxMSK is 1 the TIMER x is reset.

REMARK: to use the simultaneus start, the

prescalers of the Timers must have the same

value. Simultaneus start cannot be used in

Timer mode

Figure 10.3 TIMEROUT Signal Type

TIMER 0 START/STOP can be provided externally

on the T0STRT pin. In this case, the T0STRT

signal allows the user to work in two different

modes by setting the TESTR configuration bit of

REG_CONF5 register (see Figure 10.2) (Input

capture):

Level

Edge

start

stop

start

stop

start

Reset

Clock

Counted

Value

Timer Output

Type 1

Type 2

Prescout*Counter

T410 数据表(PDF) 53 Page - STMicroelectronics

T410 数据表(HTML) 53 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

数据表下载

链接网址

T410 数据表(PDF) 53 Page - STMicroelectronics

T410 数据表(HTML) 53 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

数据表 下载

链接网址

数据表下载