Rainbow-electronics DS1680 Manual do Utilizador descarregar pdf (Página 20)

DS1680

20 of 23

POWER-FAIL AND RESET CHARACTERISTICS

(0ºC to +70ºC; V

CC

= 3.3V ± 10%)

PARAMETER SYMBOL MIN TYP MAX UNITS

NOTES

PFI Low to PFO Low

t

PFD

200 ns

PFI High to PFO High

t

PFU

200 ns

V

CC

Detect to RST (V

CC

Falling)

t

RPD

200 ns

V

CC

Detect to RST (V

CC

Rising)

t

RPU

250 ms 15, 16

Reset Active Time t

RST

250 ms 15

Pushbutton Debounce PB

DB

250 ms 15

ST Pulse Width

t

ST

40 ns

Chip-Enable Propagation Delay to

External SRAM

t

CED

8 15 ns

V

CCTP(MAX)

to V

CCSW(MIN)

Fall Time t

FB

50 µs 20

PARALLEL INTERFACE OUTPUT TIMING Figure 9

X,

HIGH

AIN0,

HIGH

X,

LOW

AIN0,

LOW

Y,

HIGH

Y,

LOW

PEN_SELECT

D0 - D7

COEN

OUT_SELECT

BHE

AIN1,

LOW

AIN1,

LOW

t

OEZ

t

OEA

t

MUX

t

MUX

t

MUX

t

MUX

t

MUX

t

MUX

t

MUX

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