R5F2138ACDFP datasheet(45/57 Pages) RENESAS

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R8C/38C Group

5. Electrical Characteristics

REJ03B0295-0100 Rev.1.00

Page 45 of 54

Apr 23, 2010

i = 0 to 2

Figure 5.11

Serial Interface Timing Diagram when VCC = 5 V

Notes:

1. 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.

2. 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 5.12

Input Timing Diagram for External Interrupt INTi and Key Input Interrupt KIi

when VCC = 5 V

Table 5.22

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

0—

tsu(D-C)

RXDi input setup time

—

th(C-D)

RXDi input hold time

—

Table 5.23

External Interrupt INTi (i = 0 to 4) 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)

—ns

tW(INL)

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

250 (2)

—ns

tW(CKH)

tC(CK)

tW(CKL)

th(C-Q)

th(C-D)

tsu(D-C)

td(C-Q)

CLKi

TXDi

RXDi

i = 0 to 2

VCC = 5 V

INTi input

(i = 0 to 4)

tW(INL)

tW(INH)

VCC = 5 V

KIi input

(i = 0 to 3)

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