Rainbow-electronics T89C51CC01 Manual do Utilizador descarregar pdf (Página 140)

140

T89C51CC01

Rev. D – 17-Dec-01

Table 100. AC Parameters for a Variable Clock

19.4.5 External Data Memory

Write Cycle

Symbol Type

Standard

Clock X2 Clock X parameter Units

RLRH

Min 6T-x 3T-x 20 ns

WLWH

Min 6T-x 3T-x 20 ns

RLDV

Max 5T-x 2.5T-x 25 ns

RHDX

Min x x 0 ns

RHDZ

Max 2 T - x T - x 20 ns

LLDV

Max 8T-x 4T-x 40 ns

AVDV

Max 9T-x 4.5T-x 60 ns

LLWL

Min 3T-x 1.5T-x 25 ns

LLWL

Max 3 T + x 1.5 T + x 25 ns

AVWL

Min 4T-x 2T-x 25 ns

QVWX

Min T-x 0.5T-x 15 ns

QVWH

Min 7T-x 3.5T-x 25 ns

WHQX

Min T-x 0.5T-x 10 ns

RLAZ

Max x x 0 ns

WHLH

Min T-x 0.5T-x 15 ns

WHLH

Max T+x 0.5T+x 15 ns

QVWH

LLAX

ALE

PSEN

PORT 0

PORT 2

A0-A7 DATA OUT

ADDRESS

OR SFR-P2

AVWL

LLWL

QVWX

ADDRESS A8-A15 OR SFR P2

WHQX

WHLH

WLWH

1 2 ... 135 136 137 138 139 140 141 142 143 144 145 ... 148 149

T89C51CC01 1

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