HD6432351 datasheet(716/1025 Pages) RENESAS

Part #	HD6432351

Description	16-Bit Single-Chip Microcomputer

PDF	1025 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 19 Clock Pulse Generator

Rev. 3.00 Sep 15, 2006 page 682 of 988

REJ09B0330-0300

External Clock

The external clock signal should have the same frequency as the system clock (

φ).

Table 19.4 and figure 19.6 show the input conditions for the external clock.

Table 19.4 External Clock Input Conditions

VCC = 2.7 V

to 5.5 V

VCC = 5.0 V

±10%

Item

Symbol

Min

Max

Min

Max

Unit

Test Conditions

External clock input

low pulse width

tEXL

—

Figure 19.6

External clock input

high pulse width

tEXH

—

External clock rise time tEXr

—

External clock fall time

tEXf

—

tCL

0.4

0.6

0.4

0.6

tcyc

φ ≥ 5 MHz

Figure 21.4

Clock low pulse width

level

—

φ < 5 MHz

tCH

0.4

0.6

0.4

0.6

tcyc

φ ≥ 5 MHz

Clock high pulse width

level

—

φ < 5 MHz

tEXH

tEXL

tEXr

tEXf

VCC × 0.5

EXTAL

Figure 19.6 External Clock Input Timing

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