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7477 датащи(PDF) 33 Page - Renesas Technology Corp

номер детали 7477
подробное описание детали  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PDF  48 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7477 датащи(HTML) 33 Page - Renesas Technology Corp

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32
MITSUBISHI MICROCOMPUTERS
7477/ 7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Fig. 27 Block diagram of clock generating circuit
Fig. 28 Structure of CPU mode register
Q
R
S
Q
R
S
Q
R
S
Q
R
S
Q
R
S
XIN
XOUT
1/2
1/8
Reset
STP instruction
Reset
Interrupt disable flag I
Interrupt request
STP
instruction
WIT
instruction
Internal clock
φ
XCIN
1/2
Timer 4
Timer 3
T34M0
T34M1
T34M2
XCOUT
CM6
CM7
CM7
Note : The 7477 group does not have X CIN input and XCOUT output.
Select gate : At reset, shaded
side is connected.
b7
b0
CPU mode register
(Address 00FB16)
These bits must always be set to “0”.
Stack page selection bit (Note 1)
0 : In page 0 area
1 : In page 1 area
P50, P51/XCIN, XCOUT selection bit (Note 2)
0 : P50, P51
1 : XCIN, XCOUT
XCOUT drive capacity selection bit (Note 2)
0 : Low
1 : High
Clock (XIN-XOUT) stop bit (Note 2)
0 : Oscillates
1 : Stops
Internal system clock selection bit (Note 2)
0 : XIN-XOUT selected (normal mode)
1 : XCIN-XCOUT selected (low-speed mode)
Notes 1 : In the M37477M4-XXXSP/FP, M37477M2/M4TXXXSP/FP, set this bit to “0”.
In the M37478M4-XXXSP/FP, M37478M2/M4TXXXSP/FP, set this bit to “0”.
2 : In the 7477 group, set this bit to “0”.



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