Onkyo MB-S1, Service Manual

MB-S1

MICROPROCESSOR TERMINAL  DESCRIPTION

Q7004: MPD70F3033AYGC-8EU

 PIN NO.  FUNCTION  I/O  LOGIC  DESCRIPTION
 1 

SO2 

O 

uPD780232(FL TUBE) Synchronous serial output terminal

 2 

~SCK2 

I/O   

uPD780232(FL TUBE) Synchronous serial CLK terminal

 3 

RXD1 

I 

RS-232C(PHAST) input terminal

 4 

TXD1 

O 

RS-232C(PHAST) output terminal

 5 

~WP/ACC 

O 

MBM29DL (flash ROM) write-protection / acceleration terminal

 6 

EVDD 

- 

An input-and-output port and positive power supply supply for combination functional terminals

 7 

EVSS 

- 

An input-and-output port and grand potential for combination functional terminals

 8 

RY/~BY 

I 

A MBM29DL (flash ROM) ready / busy terminal

 9 

MUTE 

O 

H 

Muting ON/OFF terminal

 10 

SUBMRST 

O 

L 

MB89580 (USB microcomputer) reset terminal (Up (S))

 11 

FLMRST 

O 

L 

uPD780232 (FL microcomputer) reset terminal (Up (S))

 12 

USBHRST 

O 

L 

uPD72012 (USB hub tip) reset terminal (Up (S))

 13 

USBD+ 

O 

H 

USB D+ control terminal (being high pull-up)

 14-16 

A13-A15 

O 

Address bus 13-15

 17 

CIRON/OFF  O 

H 

Circuit power supply ON/OFF

 18 

IC/VPP 

- 

Internal connection (it connects with VSS)

 19-30 

A1-A12 

O 

Address bus 5-12, 1-4

 31 

~RESET 

I 

System reset input

 "32,33" 

"XT1,XT2" 

I 

Oscillation connection for sub clocks

 34 

REGC 

- 

Regulator output stable capacity connection

 "35,36" 

"X2,X1" 

I 

Oscillation connection for main clocks

 37 

VSS 

- 

Ground

 38 

VDD 

- 

Positive power supply terminal

 39 

CLKOUT 

O 

Internal system clock output

 40 

~WRL 

O 

L 

The low rank data light strobe signal terminal of the 16 bit data bus of external

 41 

~UBEN 

O 

L 

The higher rank byte enable signal output terminal of the 16 bit data bus of external

 42 

~WRH 

O 

L 

The higher rank data light strobe signal terminal of the 16 bit data bus of external

 43 

~RD 

O 

L 

The lead strobe signal terminal of the 16 bit data bus of external

 44 

ASTB 

O 

The latch strobe signal output terminal of an external address bus

 45 

CDLED 

O 

H 

CD LED/Program WR Start

 46 

HDDLED 

O 

H 

HDD LED/Program WR Start

 47-54 

D0-D7 

I/O   

Data bus 0-7

 55 

BVDD 

- 

A bus interface and the positive power  supply terminal for combination ports

 56 

BVSS 

- 

A bus interface and the grand terminal for combination ports 

 57-64 

D8-D15 

I/O   

Data bus 8-15 

 65-70 

A16-A21 

I/O   

Address bus 16-21 

 71 

AVDD 

- 

A A/D converter and the analog positive power supply supply terminal for combination ports 

 72 

AVSS 

- 

A A/D converter and the grand terminal for combination ports 

 73 

AVREF 

- 

The standard voltage supply terminal for A/D converters 

 74 

(intact)  (Up (H)) 

 75 

PRVSW1 

I 

Destination distinction switch 1 (temporary) 

 76 

PRVSW2 

I 

Destination distinction switch 2 (temporary) 

 77 

SW1 

I 

Model distinction switch (L:MB-S1 H:HDR -1) 

 78 

SW2 

I 

L 

General-purpose switch 2 (main program forcible download switch) 

 79 

SW3 

I 

L 

General-purpose switch 3 (for an external ROM/RAM check) 

 80-85 

(intact)  (Up (H)) 

 86 

NMI 

I 

"The terminal for power failure detection (it will input, by the time it will fall completely, if voltage begins to fall) "

 87 

FROMA0 

O 

(intact)  

 88 

D_MUTE 

O 

Digital output muting terminal (Up (H)) 

 89 

FLRDY 

I 

H 

FL microcomputer data ready input terminal 

 90 

ELVOL1 

Electronic volume control terminal 1 

 91 

ELVOL2 

Electronic volume control terminal 2 

 92 

ELVOL3 

Electronic volume control terminal 3 

 93 

GAIN_CTL 

O 

GAIN CTL port

 94 

SDA0 

I2 C-bus terminal for QPICT board connection (DATA LINE) (Up (H)) 

 95 

QPINT 

O 

L 

Interrupt QPICT board signal terminal 

 96 

SCL0 

I2 C-bus terminal for QPICT board connection (CLK LINE) (Up (H)) 

 97 

RXD0 

MB89580 (USB sub microcomputer) asynchronous serial input terminal 

 98 

TXD0 

MB89580 (USB sub microcomputer) asynchronous serial output terminal 

 99 

QPRST 

O 

L 

QPICT reset signal terminal 

 100 

SI2 

uPD780232 (FL microcomputer) synchronous serial input terminal