HT47C20L datasheet(29/55 Pages) HOLTEK

29 / 55 page

HT47C20L

January 18, 2000

Da t a B u s

Wr i t e

C h i p R es et

R e a d I/O

S y s t em W ak e- up

WE A K

Pu l l - u p

PA2

M a sk O pt i o n

V DD

Ma s k

Opt i o n

V DD

PA4~PA7 input/output lines

Da t a B u s

WE A K

Pu l l - u p

PA0 / B Z

V DD

Ma s k

Opt i o n

V DD

B Z O pti o n

R ead P a t h

B Z S i gnal

WE A K

Pu l l - u p

PA1 / B Z

V DD

Ma s k

Opt i o n

V DD

BZ O pt i o n

R ead P a t h

C h i p R es et

M a sk O pt i o n

S y s t em W ak e- up

M a sk O pt i o n

S y s t em W ak e- up

Da t a B u s

C h i p R es et

PA3/PFD input/output line

WE A K

Pu l l - u p

PB0 ~ PB3

V DD

Da t a B u s

R ead D a t a

PB input lines

Da t a B u s

Wr i t e

C h i p R es et

R e a d I/O

S y s t em W ak e- up

WE A K

Pu l l - u p

PA4 ~ PA7

M a sk O pt i o n

V DD

PA2 input/output line

HT47C20L Datasheet(PDF) 29 Page - Holtek Semiconductor Inc

HT47C20L Datasheet(HTML) 29 Page - Holtek Semiconductor Inc

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