R5F2138ACDFP datasheet(44/57 Pages) RENESAS

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R8C/38C Group

5. Electrical Characteristics

REJ03B0295-0100 Rev.1.00

Page 44 of 54

Apr 23, 2010

Timing Requirements

(Unless Otherwise Specified: VCC = 5 V, VSS = 0 V, Topr = 25

°C)

Figure 5.8

External Clock Input Timing Diagram when VCC = 5 V

Figure 5.9

TRAIO Input Timing Diagram when VCC = 5 V

Notes:

1. When using timer RF input capture mode, adjust the cycle time to (1/timer RF count source frequency × 3) or above.

2. When using timer RF input capture mode, adjust the pulse width to (1/timer RF count source frequency × 1.5) or above.

Figure 5.10

TRFI Input Timing Diagram when VCC = 5 V

Table 5.19

External Clock Input (XOUT, XCIN)

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(XOUT)

XOUT input cycle time

—

tWH(XOUT)

XOUT input “H” width

—

tWL(XOUT)

XOUT input “L” width

—

tc(XCIN)

XCIN input cycle time

—

µs

tWH(XCIN)

XCIN input “H” width

—

µs

tWL(XCIN)

XCIN input “L” width

—

µs

Table 5.20

TRAIO Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(TRAIO)

TRAIO input cycle time

100

—

tWH(TRAIO)

TRAIO input “H” width

—

tWL(TRAIO)

TRAIO input “L” width

—

Table 5.21

TRFI Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(TRFI)

TRFI input cycle time

TBD (1)

—ns

tWH(TRFI)

TRFI input “H” width

TBD (2)

—ns

tWL(TRFI)

TRFI input “L” width

TBD (2)

—ns

External clock input

tWH(XOUT),

tWH(XCIN)

tC(XOUT), tC(XCIN)

tWL(XOUT), tWL(XCIN)

VCC = 5 V

TRAIO input

VCC = 5 V

tC(TRAIO)

tWL(TRAIO)

tWH(TRAIO)

tWH(TRFI)

tc(TRFI)

tWL(TRFI)

TRFI input

VCC = 5 V

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