116A datasheet(91/102 Pages) RENESAS

91 / 102 page

REJ03B0297-0100

Rev.1.00

Page 91 of 99

Jul 16, 2010

R32C/116A Group

5. Electrical Characteristics

VCC =3.3 V

Switching Characteristics (VCC = 3.0 to 3.6 V, VSS = 0 V, and Ta =Topr, unless otherwise noted)

Notes:

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-ALE) = tsu(A-ALE) = (Tsu(A-R) - 1) × tc(Base) -15 [ns] (when Tsu(A-R) is greater than 1)

tsu(S-ALE) = tsu(A-ALE) = 0.5 × tc(Base) -15 [ns] (when Tsu(A-R) is 1)

tw(ALE) = (Tsu(A-R) - 1) × tc(Base) - 20 [ns] (when Tsu(A-R) is greater than 1)

tw(ALE) = 0.5 × tc(Base) - 20 [ns] (when Tsu(A-R) is 1)

tw(R) = Tw(R) × tc(Base) -10 [ns]

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

When Tsu(A-R) is greater than 1 or Tsu(A-W) is greater than 1. Change “tc(Base)” to “0.5 × tc(Base)”

when Tsu(A-R) is 1 or Tsu(A-W) is 1.

Table 5.62

External Bus Timing (Multiplexed bus)

Symbol

Characteristic

Measurement

condition

Value

Unit

Min.

Max.

tsu(S-ALE)

Chip-select setup time for ALE

Refer to

Figure 5.6

(1)

th(R-S)

Chip-select hold time after read

1.5 × tc(Base) - 15

tsu(A-ALE)

Address setup time for ALE

(1)

th(ALE-A)

Address hold time after ALE

tc(Base) - 5 (2)

th(R-A)

Address hold time after read

1.5 × tc(Base) - 15

td(ALE-R)

ALE-read delay time

tc(Base) - 5 (2)

tc(Base) + 10 (2)

tw(ALE)

ALE pulse width

(1)

tdis(R-A)

Address disable time after read

8ns

tw(R)

Read pulse width

(1)

th(W-S)

Chip-select hold time after write

1.5 × tc(Base) - 15

th(W-A)

Address hold time after write

1.5 × tc(Base) - 15

td(ALE-W)

ALE-write delay time

tc(Base) - 5 (2)

tc(Base) + 10 (2)

tw(W)

Write pulse width

(1)

tsu(D-W)

Data setup time for write

(1)

th(W-D)

Data hold time after write

0.5 × tc(Base)

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