R8C datasheet(75/106 Pages) RENESAS

75 / 106 page

R01DS0011EJ0100 Rev.1.00

Page 75 of 102

Dec 21, 2010

R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group

5. Electrical Characteristics

Figure 5.10

Input and Output Timing of Serial Interface

Notes:

When selecting the digital filter by the INTi input filter select bit, use an INTi input HIGH width of either (1/digital filter clock

frequency × 3) or the minimum value of standard, whichever is greater.

When selecting the digital filter by the INTi input filter select bit, use an INTi input LOW width of either (1/digital filter clock

frequency × 3) or the minimum value of standard, whichever is greater.

Figure 5.11

Input Timing of External Interrupt INTi and Key Input Interrupt KIi

Table 5.28

Timing Requirements of Serial Interface

(VSS = 0 V and Topr =

−20 to 85 °C (N version)/ −40 to 85 °C (D version), unless

otherwise specified.)

Symbol

Parameter

Standard

Unit

VCC = 2.2V, Topr = 25

°CVCC = 3V, Topr = 25°CVCC = 5V, Topr = 25°C

Min.

Max.

Min.

Max.

Min.

Max.

tc(CK)

CLK0 input cycle time

800

–

300

–

200

–

tW(CKH)

CLK0 input “H” width

400

–

150

–

100

–

tW(CKL)

CLK0 input “L” width

400

–

150

–

100

–

td(C-Q)

TXD0 output delay time

–

200

–

th(C-Q)

TXD0 hold time

0–

0–0–

tsu(D-C)

RXD0 input setup time

150

–

th(C-D)

RXD0 input hold time

–

Table 5.29

Timing Requirements of External Interrupt INTi (i = 0 to 3, 5, 7) and Key Input Interrupt

KIi (i = 0 to 7)

(VSS = 0 V and Topr =

−20 to 85 °C (N version)/ −40 to 85 °C (D version), unless

otherwise specified.)

Symbol

Parameter

Standard

Unit

VCC = 2.2V, Topr = 25

°CVCC = 3V, Topr = 25°CVCC = 5V, Topr = 25°C

Min.

Max.

Min.

Max.

Min.

Max.

tW(INH)

INTi input “H” width, KIi input “H” width

1000 (1)

–

380 (1)

–

250 (1)

–ns

tW(INL)

INTi input “L” width, KIi input “L” width

1000 (2)

–

380 (2)

–

250 (2)

–ns

tW(CKH)

tC(CK)

tW(CKL)

th(C-Q)

th(C-D)

tsu(D-C)

td(C-Q)

CLK0

TXD0

RXD0

INTi input

(i = 0 to 3, 5, 7)

tW(INL)

tW(INH)

KIi input

(i = 0 to 7)

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