Microcomputer's Terminal Description - Kenwood KNA-DV3100 Service Manual

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MICROCOMPUTER'S TERMINAL DESCRIPTION

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MICROCOMPUTER : MB89935B (NAVI BOARD : IC106)
Pin No. Pin Name I/O
1 P04 O
2 P05 O
3 P06 O
4 P07 I
5 MODE0 I
6 MODE1 I
7 RST# I
8 X0 -
9 X1 -
10 VSS -
11 P37 O
12 P36 I
13 P35 I
14 P34 I
15 P33 I
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16 C -
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17 P32 I
18 P31 I
19 P30 O
20 P50 O
21 AVSS -
22 P40 O
23 P41 O
24 P42 O
25 P43 I
26 P00 I
27 P01 I
28 P02 I
29 P03 I
30 VCC -
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Function
FRES output
RES output
NMI output
Mode input 0
Mode input 1
Reset input
Clock oscillator terminal
Clock oscillator terminal
GND connection terminal
P ON terminal
WDP input
ACC detection input
BU detection input
SDRAM clock enable input
C connection terminal
Delayed ACC input
ACC detection output
Backup operation complete notice
GND connection terminal
V33D switching output
V33D switching output
Mute output
V33 monitor input
VMAIN monitor input
BU monitor input
V50 output monitor input
V80 output monitor input
Positive power supply terminal
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Processing Operation Description
Lo : Flash ROM and CORE1 reset
Lo : System reset
Interrupt output to CORE1
Not used (Pull down to GND line)
Lo Fixed (Connect to GND Line)
Lo Fixed (Connect to GND Line)
Lo : At the time when system is down and when panel reset SW is pressed
Connect to GND line
Hi : Turning power ON for SW's system power circuit
Detection of watchdog pulse from CORE1
Normal operation : Logic is reversed within 300ms
Hi : ACC ON
Hi : BU ON
Lo : Self-refresh of SDRAM, Hi : Normal operation of SDRAM
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(0.1µF)
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Not used (Pull down to GND line)
Hi : CORE1 in operation and panel mechanism in operation when ACC is OFF
Hi : Power ON, Lo : Power OFF (Output to CORE1 and system computer)
Hi : SDRAM CKE core in control, Lo : Backup processing complete
Connect to GND line
Lo : Normal (ACC ON)
Lo : At the time of backup
Lo : Mute
Lo : No Output
Lo : No Output
Lo : No BU
Lo : No Output
Lo : No Output
Connect to 3.3V line backup
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KNA-DV3100/DV3200
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