38K2 datasheet(271/358 Pages) RENESAS

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3.1 Electrical characteristics (L.Ver)

Rev.2.00

Oct 15, 2006

page 10 of 99

38K2 Group

REJ09B0338-0200

APPENDIX

Min.

Typ.

Max.

Symbol

Parameter

Limits

Unit

tsu(S-R)

tsu(S-W)

th(R-S)

th(W-S)

tsu(A-R)

tsu(A-W)

th(R-A)

th(W-A)

tsu(ACK-R)

tsu(ACK-W)

th(R-ACK)

th(W-ACK)

tWH(R)

tWL(R)

tWH(W)

tWL(W)

tWH(ACK)

tWL(ACK)

tsu(D-W)

th(W-D)

tsu(D-ACK)

th(ACK-W)

tC(

φ)

tW(cycle)

ExCS setup time for read

ExCS setup time for write

ExCS hold time for read

ExCS hold time for write

ExA0, ExA1 setup time for read

ExA0, ExA1 setup time for write

ExA0, ExA1 hold time for read

ExA0, ExA1 hold time for write

ExDACK setup time for read

ExDACK setup time for write

ExDACK hold time for read

ExDACK hold time for write

Read “H” pulse width

Read “L” pulse width

Write “H” pulse width

Write “L” pulse width

ExDACK “H” pulse width

ExDACK “L” pulse width

Data input setup time before write

Data input hold time after write

Data input setup time before ExDACK

Data input hold time after ExDACK

CPU clock cycle time

Burst mode access cycle time

120

160

166

tC(

φ)•3+30

tC(

φ)•5+30

Table 3.1.10 Timing requirements of external bus interface (EXB) (2)

(VCC = 3.00 to 4.00 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)

USB function not operating

USB function operating

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