M38B53M4-059FP datasheet(239/355 Pages) MITSUBISHI

Part #	M38B53M4-059FP

Description	8-BIT SINGLE-CHIP MICROCOMPUTER

PDF	355 Pages

Scroll/Zoom	100%

Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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239 / 355 page

38B5 Group User’s Manual

APPLICATION

2-151

2.11 Clock generating circuit

2.11.1 Relevant register

Figure 2.11.1 shows the structure of the CPU mode register.

Fig. 2.11.1 Structure of CPU mode register

CPU mode register

b7 b6 b5 b4 b3 b2 b1 b0

CPU mode register

(CPUM, CM: address 3B16)

00 : Single-chip mode

01 :

10 :

Not available

11 :

Name

Functions

At reset R W

0 : Page 0

1 : Page 1

0: Low drive

1: High drive

0: Oscillating

1: Stopped

Processor mode

bits

Stack page

selection bit

XCOUT drivability

selection bit

Port Xc switch bit

Main clock (XIN-

XOUT) stop bit

Main clock division

ratio selection bit

Internal system

clock selection bit

b1 b0

0: f(XIN) (high-speed mode)

1: f(XIN)/4 (middle-speed

mode)

0: XIN–XOUT selection

(middle-/high-speed

mode)

1: XCIN–XCOUT selection

(low-speed mode)

0: I/O port function

1: XCIN-XCOUT oscillation

function

M38B53M4-059FP Datasheet(PDF) 239 Page - Mitsubishi Electric Semiconductor

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