DM-VH7
5
CIRCUIT DESCRIPTION
Voltage(V)
KR0 (89)
KR2 (91)
KR1 (90)
Threshold
voltage(V)
5.00
(no key on)
(no key on)
(no key on)
4.59
4.17
-----
eject
-----
3.75
3.33
power/standby
o.t.e.
-----
2.92
2.50
stop
ff/level_up
-----
2.09
1.67
down
up
-----
1.25
0.88
fb/level_down
play/pause
-----
0.42
0.00
rec
mode
-----
2-3 Key matrix
3. MD mechanism microprocessor HD6432227N01FA(X33: IC24)
3-1 Microprocessor periphery block diagram
(X33)CI2
(X33)IC24
MNT0
ATRAC
MD ucom
AD/DA
MNT1
CXD2654R
MNT2
MNT3
(X25)IC11
SWDT
SCLK
CTXD
XLAT
CRXD
SRDT
SENS
XRST
SQSY
DQSY
(X33)IC12
RECP
XINT
ADDARST
TX
EMPHA
LDON
RMS
HMUTE
SRVMOD
E2PROM
MECHA
SCL
SDA
POWER
IDSW
MUTE
HEADPOS
MUTE_BAR
MDM-06
DISCIN
RESET
STTLMT
CE
LOADIN
LOADOUT
BITRATE
DM-VH7(K)
COVER1,1P(
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2:43
PM
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