R8C datasheet(54/60 Pages) RENESAS

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R8C/38A Group

5. Electrical Characteristics

REJ03B0274-0120 Rev.1.20

Page 54 of 57

Jul 31, 2010

Timing requirements

(Unless Otherwise Specified: VCC = 2.2 V, VSS = 0 V, Topr = 25

°C)

Figure 5.18

XIN Input and XCIN Input Timing Diagram when VCC = 2.2 V

Figure 5.19

TRAIO Input Timing Diagram when VCC = 2.2 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 5.20

TRFI Input Timing Diagram when VCC = 2.2 V

Table 5.33

XIN Input, XCIN Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(XIN)

XIN input cycle time

200

—

tWH(XIN)

XIN input “H” width

—

tWL(XIN)

XIN 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 5.34

TRAIO Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(TRAIO)

TRAIO input cycle time

500

—

tWH(TRAIO)

TRAIO input “H” width

200

—

tWL(TRAIO)

TRAIO input “L” width

200

—

Table 5.35

TRFI Input

Symbol

Parameter

Standard

Unit

Min.

Max.

tc(TRFI)

TRFI input cycle time

2,000 (1)

—ns

tWH(TRFI)

TRFI input “H” width

1,000 (2)

—ns

tWL(TRFI)

TRFI input “L” width

1,000 (2)

—ns

XIN input

tWH(XIN)

tC(XIN)

tWL(XIN)

VCC = 2.2 V

TRAIO input

tC(TRAIO)

tWL(TRAIO)

tWH(TRAIO)

VCC = 2.2 V

tWH(TRFI)

tc(TRFI)

tWL(TRFI)

TRFI input

VCC = 2.2 V

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