7480 datasheet(207/337 Pages) RENESAS

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7480 Group and 7481 Group User's Manual

1-190

HARDWARE

1.21 Electrical Characteristics

1.21.2 Necessary Conditions for Timing and Switching Characteristics

Table 1.21.13 lists the necessary conditions for timing and the switching characteristics of the 7480 Group

and 7481 Group, and Figure 1.21.1 shows the timing diagram.

Table 1.21.13 Necessary Conditions for Timing and Switching Characteristics (Note)

0.2VCC

0.8VCC

tc(SCLK)

tWL(SCLK)

tWH(SCLK)

td(SCLK-TXD)

RXD

SCLK

TXD

tsu(RXD-SCLK)th(SCLK-RXD)

Figure 1.21.1 Timing Diagram

1.21.3 Typical Characteristics of Power Source Current

The typical characteristics of the power source current

described in this section are based on a limited

number of samples in the 7480 Group and 7481

Group. ‘Typical values’ are not guaranteed.

For the limits, refer to section 1.21.1 Electrical

Characteristics.

Figure 1.21.2 shows a measurement circuit of typical

power source current characteristics.

ICC

7480 Group

7481 Group

VCC

VSS

0 to 5.5V

XOUT

XIN

Figure 1.21.2 Measurement Circuit of Typical Power

Source Current Characteristics

Unit

Max.

100

Min.

2000

880

160

500

220

Typ.

Note: Values at VCC = 4.5 V to 5.5 V, VSS = 0 V, Ta = –40

°C to 85°C, and f(XIN) = 8 MHz

Limits

Symbol

tC(SCLK)

tWH(SCLK)

tWL(SCLK)

tSU(RxD–SCLK)

th(SCLK–RxD)

td(SCLK–TxD)

tC(SCLK)

tWH(SCLK)

tWL(SCLK)

Parameter

Serial I/O clock input cycle time

Serial I/O clock input HIGH pulse width

Serial I/O clock input LOW pulse width

Serial I/O input set-up time

Serial I/O input hold time

Serial I/O output delay time

Serial I/O clock input cycle time

Serial I/O clock input HIGH pulse width

Serial I/O clock input LOW pulse width

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