STR71XF datasheet(56/78 Pages) STMICROELECTRONICS

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Electrical parameters

STR71xF

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4.3.6

TIM timer characteristics

Subject to general operating conditions for V33, fMCLK, and TA unless otherwise

specified.

Refer to Section 4.3.5: I/O port pin characteristics on page 50 for more details on

the input/output alternate function characteristics (output compare, input capture,

external clock, PWM output...).

4.3.7

EMI - external memory interface

Subject to general operating conditions for VDD, fHCLK, and TA unless otherwise specified.

The tables below use a variable which is derived from the EMI_BCONn registers (described

in the STR71x Reference Manual) and represents the special characteristics of the

programmed memory cycle.

Table 32.

TIM characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

tw(ICAP)in

Input capture pulse time

tCK_TIM

tres(TIM)

Timer resolution time

tPCLK2

fPCLK2 = 30 MHz

33.3

fEXT

Timer external clock

frequency

fCK_TIM(MAX) =

fMCLK

fCK_TIM/4

MHz

fCK_TIM = fMCLK =

60 MHz

015

MHz

ResTIM

Timer resolution

bit

tCOUNTER

16-bit Counter clock period

when internal clock is

selected

65536

tPCLK2

fPCLK2 = 30 MHz

0.033

2184

µs

TMAX_COUNT Maximum Possible Count

65536x

65536

tPCLK

fPCLK2 = 30 MHz

143.1

Table 33.

EMI general characteristics

Symbol

Parameter

Value

tMCLK

CPU clock period

1 / fMCLK

Memory cycle time wait states

tMCLK x (1 + [C_LENGTH])

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