116A datasheet(77/102 Pages) RENESAS

77 / 102 page

REJ03B0297-0100

Rev.1.00

Page 77 of 99

Jul 16, 2010

R32C/116A Group

5. Electrical Characteristics

VCC =5V

Switching Characteristics (VCC = 4.2 to 5.5 V, VSS = 0 V, and Ta =Topr, unless otherwise noted)

Note:

The value is calculated by the following formulas based on the base clock cycles (tc(Base)) and

respective cycles of Tsu(A-R), Tw(R), Tsu(A-W), and Tw(W) set by registers EBC0 to EBC3. If the

calculation results in a negative value, modify the value to be set. For the details of how to set values,

refer to the User’s manual.

tsu(S-R) = tsu(A-R) = Tsu(A-R) × tc(Base) - 15 [ns]

tw(R) = Tw(R) × tc(Base) - 10 [ns]

tsu(S-W) = tsu(A-W) = Tsu(A-W) × tc(Base) - 15 [ns]

tw(W) = tsu(D-W) = Tw(W) × tc(Base) - 10 [ns]

Table 5.35

External Bus Timing (Separate bus)

Symbol

Characteristic

Measurement

condition

Value

Unit

Min.

Max.

tsu(S-R)

Chip-select setup time for read

Refer to

Figure 5.6

(1)

th(R-S)

Chip-select hold time after read

tc(Base) -15

tsu(A-R)

Address setup time for read

(1)

th(R-A)

Address hold time after read

tc(Base) -15

tw(R)

Read pulse width

(1)

tsu(S-W)

Chip-select setup time for write

(1)

th(W-S)

Chip-select hold time after write

1.5 × tc(Base) -15

tsu(A-W)

Address setup time for write

(1)

th(W-A)

Address hold time after write

1.5 × tc(Base) -15

tw(W)

Write pulse width

(1)

tsu(D-W)

Data setup time for write

(1)

th(W-D)

Data hold time after write

0ns

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