32C datasheet(43/55 Pages) RENESAS

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R8C/32C Group

5. Electrical Characteristics

R01DS0009EJ0100 Rev 1.00

Page 43 of 52

Aug. 24, 2010

i = 0, 2

Figure 5.10

Serial Interface Timing Diagram when VCC = 5 V

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 Diagram for External Interrupt INTi and Key Input Interrupt KIi when Vcc

= 5 V

Table 5.20

Serial Interface

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(CK)

CLKi input cycle time

200

−

tW(CKH)

CLKi input “H” width

100

−

tW(CKL)

CLKi input “L” width

100

−

td(C-Q)

TXDi output delay time

−

th(C-Q)

TXDi hold time

−

tsu(D-C)

RXDi input setup time

−

th(C-D)

RXDi input hold time

−

Table 5.21

External Interrupt INTi (i = 0, 1, 3) Input, Key Input Interrupt KIi (i = 0 to 3)

Symbol

Parameter

Standard

Unit

Min.

Max.

tW(INH)

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

250 (1)

−

tW(INL)

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

250 (2)

−

tW(CKH)

tC(CK)

tW(CKL)

th(C-Q)

th(C-D)

tsu(D-C)

td(C-Q)

CLKi

TXDi

RXDi

i = 0, 2

VCC = 5 V

INTi input

(i = 0, 1, 3)

tW(INL)

tW(INH)

VCC = 5 V

KIi input

(i = 0 to 3)

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