R8C23 datasheet(45/54 Pages) RENESAS

45 / 54 page

R8C/22 Group, R8C/23 Group

5. Electrical Characteristics

Rev.2.00 Aug 20, 2008

Page 43 of 48

REJ03B0097-0200

i = 0 or 1

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 the INTi input HIGH width to the greater value, either

(1/digital filter clock frequency x 3) or the minimum value of standard.

When selecting the digital filter by the INTi input filter select bit, use the INTi input LOW width to the greater value, either

(1/digital filter clock frequency x 3) or the minimum value of standard.

Figure 5.11

External Interrupt INTi Input Timing Diagram when VCC = 5 V (i = 0 to 3)

Table 5.18

Serial Interface

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(CK)

CLK0 input cycle time

200

−

tW(CKH)

CLK0 input “H” width

100

−

tW(CKL)

CLK0 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 5.19

External Interrupt INTi (i = 0 to 3) Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tW(INH)

INTi input “H” width

250(1)

−

tW(INL)

INTi input “L” width

250(2)

−

i = 0 or 1

Vcc = 5V

CLK0

TXDi

RXDi

tW(CKH)

tc(CK)

tW(CKL)

th(C-Q)

th(C-D)

tsu(D-C)

td(C-Q)

i = 0 to 3

Vcc = 5V

INTi input

tW(INL)

tW(INH)

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