38C3 datasheet(142/224 Pages) RENESAS

Part #	38C3

Description	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	224 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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142 / 224 page

38C3 Group User’s Manual

APPLICATION

2-77

2.8 Clock generating circuit

Fig. 2.8.7 Initial setting of relevant registers

CPU mode register (address 003B16)

CPUM

00 1

Port XC: XCIN-XCOUT oscillation function

CPU mode register (address 003B16)

CPUM0 0 1

0 0

Internal system clock: f(XIN) (high-speed mode)

Timer 1 (address 002016)

T13F16

Set (Division ratio -1); 63 (3F16)

Timer 12 mode register (address 002816)

T12M0 0 0

Timer 1 count: Operating

Timer 2 count: Operating

Timer 1 count source: f(XIN)/16

Timer 2 count source: Timer 1 underflow

P41 I/O port

Timer 34 mode register (address 002916)

T34M

Timer 3 count: Operating

Timer 3 count source: Timer 2 underflow

P42 I/O port

Interrupt request register 1 (address 003C16)

IREQ10

Set “0” to timer 1 interrupt request bit

Set “0” to timer 3 interrupt request bit

Interrupt control register 1 (address 003E16)

ICON11

Timer 1 interrupt: Enabled

38C3 Datasheet(PDF) 142 Page - Renesas Technology Corp