Yamaha CD-S300 Service Manual page 27

Pin No. Function Name
1, 46, 47, 48 Port 7
P70 to P73
18 PWM0
17 PWM1
37 UHD-
38 UHD+
2 RES
3 XT1
4 XT2
6 CF1
7 CF2
I/O
I/O • 4-bit I/O port
• I/O specifiable in 1-bit units
• Pull-up resistors can be turned on and off in 1-bit units
• Pin functions
P70 : INT0 input/HOLD reset input/timer 0L capture input/watchdog timer output
P71 : INT1 input/HOLD reset input/timer 0H capture input
P72 : INT2 input/HOLD reset input/timer 0 event input/timer 0L capture input/high
speed clock counter input
P73 : INT3 input (input with noise filter)/timer 0 event input/timer 0H capture input/IR
remote control receiver input
AD converter input ports : AN8 (P70), AN9 (P71)
Interrupt acknowledge types
Rising Falling
INT0 enable enable
INT1 enable enable
INT2 enable enable
INT3 enable enable
I/O PWM0, PWM1 output port
General-purpose input port
• Pin functions
PWM0 : Audio interface master clock output
PWM1 : Audio interface master clock input
I/O USB data I/O pin UHD-/general-purpose I/O port
I/O USB data I/O pin UHD+/general-purpose I/O port
I Reset pin
I • 32.768 kHz crystal oscillator input
• Pin functions
General-purpose input port
AD converter input ports : AN10
Must be connected to VDD1 when not to be used
I/O • 32.768 kHz crystal oscillator output
• Pin functions
General-purpose I/O
AD converter input port : AN11
Must be set for oscillation and kept open if not to be used
I Ceramic/crystal resonator input
I Ceramic/crystal resonator output
Detail of Function
Rising
and H level
Falling
disable enable
disable enable
enable disable
enable disable
CD-S300
Option
No
L level
enable
enable
disable
disable
No
No
No
No
No
No
No
No
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