7540 datasheet(59/88 Pages) RENESAS

59 / 88 page

7540 Group

Rev.4.00

Jun 21, 2004

page 59 of 82

REJ03B0011-0400Z

Table 16 Timing requirements (3) (VCC = 2.2 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)

Min.Typ.Max.

Symbol

Parameter

Limits

Unit

Reset input “L” pulse width

External clock input cycle time

External clock input “H” pulse width

External clock input “L” pulse width

CNTR0 input cycle time

CNTR0, INT0, INT1, input “H” pulse width

CNTR0, INT0, INT1, input “L” pulse width

CNTR1 input cycle time

CNTR1 input “H” pulse width

CNTR1 input “L” pulse width

Serial I/O1 clock input cycle time (Note)

Serial I/O1 clock input “H” pulse width (Note)

Serial I/O1 clock input “L” pulse width (Note)

Serial I/O1 input set up time

Serial I/O1 input hold time

Serial I/O2 clock input cycle time

Serial I/O2 clock input “H” pulse width

Serial I/O2 clock input “L” pulse width

Serial I/O2 input set up time

Serial I/O2 input hold time

tW(RESET)

tC(XIN)

tWH(XIN)

tWL(XIN)

tC(CNTR0)

tWH(CNTR0)

tWL(CNTR0)

tC(CNTR1)

tWH(CNTR1)

tWL(CNTR1)

tC(SCLK1)

tWH(SCLK1)

tWL(SCLK1)

tsu(RxD1–SCLK1)

th(SCLK1–RxD1)

tC(SCLK2)

tWH(SCLK2)

tWL(SCLK2)

tsu(SDATA2–SCLK2)

th(SCLK2–SDATA2)

500

200

1000

460

8000

3200

4000

1900

800

400

4000

1900

800

µs

Note: In this time, bit 6 of the serial I/O1 control register (address 001A16) is set to “1” (clock synchronous serial I/O1 is selected).

When bit 6 of the serial I/O1 control register is “0” (clock asynchronous serial I/O1 is selected), the rating values are divided by 4.

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