Ic21: Hd6433397A97F; Main Micro Processor - Yamaha RX-V795a Service Manual

IC21 : HD6433397A97F

Main Micro Processor

STBY or Fvpp
P52/SCK0
P51/RXD0
P50/TXD0
P92/IRQ0
P91/IRQ1
P90/IRQ2
P10/A0
P11/A1
P12/A2
P13/A3
P14/A4
P15/A5
P16/A6
P17/A7
P20/A8
P21/A9
P22/A10
P23/A11
P24/A12
P25/A13
P26/A14
P27/A15
P60/FTCI/KEYIN0
P61/FTOA/KEYIN1
P62/FTIA/KEYIN2
P63/FTIB/KEYIN3
P64/FTIC/KEYIN4
P65/FTID/KEYIN5
P66/FTOB/IRQ6/KEYIN6
P67/IRQ7/KEYIN7
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
RES 1
XTAL 2
EXTAL 3
MD1 4
MD0 5
NMI 6
7
Vcc 8
9
10
11
Vss 12
P97 13
P96/ 14
P95 15
P94 16
P93 17
18
19
20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Data Bus (Low)
ROM
Watchdog
Timer
8 bit timer
x 2ch
PWM Timer
x 2ch
Port 4
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
CPU
H8/300
RAM
Serial
communication
Interface
x 2ch
10 bit
A/D Converter
x 8ch
16 bit
Free running
timer
Port 7 Port 5
RX-V795a/RDS/HTR-5170
P14
P15
P16
P17
Vss
P20
P21
P22
P23
P24
P25
P28
P27
Vcc
P47/PW1
P46/PW0
P45
P44
P43
P42
P90/ADTRG/IRQ2
P91/IRQ1
P92/IRQ0
P93/RD
P94/WR
P95/AS
P96/
P97/WAIT
P30/D0
P31/D1
P32/D2
P33/D3
P34/D4
P35/D5
P36/D6
P37/D7
P80
P81
P82
P83
P84/TXD1/IRQ3
P85/RXD1/IRQ4
P86/SCK1/IRQ5
36