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

Il numero della parte M38B53M4-059FP
Spiegazioni elettronici  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  355 Pages
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Produttore elettronici  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M38B53M4-059FP Scheda tecnica(HTML) 239 Page - Mitsubishi Electric Semiconductor

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38B5 Group User’s Manual
APPLICATION
2-151
2.11 Clock generating circuit
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 :
b
0
1
2
3
4
5
6
7
Name
0
Functions
At reset R W
0
0 : Page 0
1 : Page 1
0
0: Low drive
1: High drive
1
0
0: Oscillating
1: Stopped
0
1
0
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



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