M525

{Data from M525 manual (version 1.0) P.9 to P.14}

J4 Power Supply Connector

The power supply connectors are two six-pin male header connectors. Plug the dual connectors from the power directly onto the board connectors.
Most of power supply have two leads. Each lead has six wires. Two of which are black, orient the connectors, so the black wires are in the middle.

Power Supply Connectors
Pin Description Pin Description
1 Power Good 7 Ground
2 + 5V DC 8 Ground
3 + 12V DC 9 - 5V DC
4 - 12V DC 10 + 5V DC
5 Ground 11 + 5 V DC
6 Ground 12 + 5V DC

J1 Keyboard Connector

A standard five-pin female DIN keyboard connector is located at the rear of the board J1.

Keyboard Connector
Pin Description
1 Keyboard Clock
2 Keyboard Data
3 N.C.
4 Ground
5 + 5VDC

J5, J6 Universal Serial Bus Connector

U.S.B Connector
Pin Description
1 +5 VDC
2 DATA -
3 DATA +
4 Ground

J10 HDD LED Connector

HDD LED Connector
Pin Description
1 5V
2 Active Low

J11 Reset Switch Connector

Attach the Reset switch cable to this connector

Reset Connector
Setting Description
Open Normal Mode
Short Reset System

J7 CMOS RAM

CMOS RAM
Description JP7
Normal Open
Clear CMOS close

J9 Keylock & Power LED Connector

J9 is a keylock connector that enables and disables the keyboard and the Power-LED on the case.

Keylock & Power LED Connector
Pin Description
1 LED Output
2 N.C.
3 Ground
4 Keylock

J8 Speaker Connector

Attach the system speaker to connector J8.

Speaker Connector
Pin Description
1 DATA Out
2 N.C.
3 Ground
4 + 5V

JP8 Flash ROM Voltage Selector

The mainboard can uses two types of Flash ROM 5 volt and 12 volt. Set the mainboard for either type with jumper JP8. You can update both types with new BIOS files as they come available.

Flash ROM Voltage Selector
Description JP8
12 volt Flash ROM Pin 2-3 short (default)
EPROM and 5 volt Flash ROM Pin 1-2 short

JP13 AT Bus Clock Selector

AT Bus Clock Selector
Description JP13
PCI Clock/4 Pin 1-2 short (default)
PCI Clock/3 Pin 2-3 short

NOTE:
CPU Ex. Speed=60MHz or 66MHz, JP13 set to 1-2
CPU Ex. Speed=50MHz, JP 13 set to 2-3

J14 Sleep Switch Connector

Attach the sleep switch cable to this connector

Sleep Switch Connector
Description JP14
Normal Mode Open
Sleep Mode On Pin 1-2 short

JP1, JP2 DIMM Socket Voltage Selectors

DIMM Socket Voltage Selectors
Voltage Selectors JP1, JP2
3.3 Volt Pin 2-3 short
5.0 Volt Pin 1-2 short (default)

NOTE:
All synchronous DRAM (SDRAM) JP1, JP2 must be set to 3.3 V position.

JP5, JP6 CPU Speed Selectors

The mainboard has a clock generator that lets you choose the CPU frequency by settings jumpers JP5, JP6. You can set the CPU speed to 50 / 60 MHz or 66 MHz as shown below.

CPU Speed Selectors
Jumpers 66 MHz 60 MHz 50 MHz {55 MHz
(CMA8860-55)		 /75 MHz}
(CMA8860-75)
JP6 Short Open Short Open Open
JP5 Open Short Short Open Open

JP11, JP12 - CPU Internal Clock Speed Selectors

CPU Internal Clock Speed Selectors
Intel Cyrix AMD JP11 JP12
x 2.0 x 2.0 Reserved Short Open
x 1.5 Reserved x 1.5 Open Open
x 2.5 Reserved Reserved Short Short
x 3.0 Reserved Reserved Open Short

NOTE:
CPU Internal Clock Speed = (External Input Clock) x (table list) factor.

JP15 CPU Voltage Regulator Output Selectors

CPU Voltage Regulator Output Selectors
Description JP15
3.3 Volt (STD/VR) Pin 2-3 short
3.5 Volt (VRE) Pin 1-2 short (default)

J3 PS/2 Mouse Connector

PS/2 Mouse Connector
PIN Description
1 Mouse DATA
2 NC
3 Ground
4 + 5 VDC
5 Mouse CLK
6 NC

JP3 Cache Memory Selectors

Cache Memory Selectors
SYN. Cache Size Onboard U5, U6 On module J7 U9 (Tag RAM) JP3 setting
256K 256K None 32K x 8 Pin 2-3 short
256K None 256K None -
512K 256K 256K 32K x 8 Pin 1-2 short
512K 512K None 32K x 8 Pin 1-2 short
512K None 512K None -

NOTE:
When you have a cache module to plug into a 160-pin dual readout connector. You must make sure that the cache module follow the specification of the Intel COAST 3.0 or later version. Please contract the modules supplier to avoid not working properly or damaging any modules circuits.