EM77950 datasheet(92/102 Pages) EMC

92 / 102 page

EM77950

BB Controller

•

Product Specification (V1.0) 10.09.2007

(This specification is subject to change without further notice)

Table 17.1 Values of RST, T and P after a reset

Condition

RST

Power on

WDTC instruction

WDT timeout

SLEP instruction

Wake-Up on pin change during SLEEP mode

*P: Previous status before reset

15.3

System Set-up Time (SST)

In order to have a successful start up, System Set-up Time (SSU) is employed to

guarantee a stable clock for IC operation. It is made up of two delay sources:

(1) Internal RC Oscillation Set-up Delay (IRCOSUD): Internal RC oscillation shared

with a watchdog timer divided by an 8-bit ripple counter.

(2) Main Oscillation Set-up Delay (MOSUD): A 10-bit ripple counter is used to filter

unstable main clocks at the beginning of power-on before the chip starts to run.

This delay is performed right after IRCOSUD, if enabled

768

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

⎟

⎠

⎞

⎜

⎝

⎛

Clock

Main

SST

8 -

bit Ripple Counter

Internal

RC Osc .

10 -

bit Ripple Counter

OSC1

RCSUTE

SST

Fig. 15 System Set-up Time

EM77950 Datasheet(PDF) 92 Page - ELAN Microelectronics Corp

EM77950 Datasheet(HTML) 92 Page - ELAN Microelectronics Corp

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

Datasheet Download

Link URL