Common signal nouns in circuit diagrams

ADJ Adjustable Adjustable For example, size and direction control means

switching on and off VID voltage identification. Voltage Identification

SS soft start (short for soft start)

FB feedback (abbreviation for feedback word)

COMP compensation ( short for Compensatory word)

VSEN voltage Detect voltage senser

ISP current detection p positive end corresponds to isn n negative end




IRMP does not find Ramp amplitude PWM ramp amplitude set by external resistor. Ramp

amplitude Pulse width modulation used to adjust the amplitude slope

DVD does not find uvlo owe The

IMAX maximum current is protected by the voltage lock pin below a certain value (I don't know if it is right). Over current protection amplitude set. Overcurrent protection amplitude setting

PWM Pulse width modulation Pulse-Width Modulation

ISN No




CAS#: Column selection signal

RAS# : Row selection signal

WE#: Enable signal (high level allows read, low level allows write)

CS#: Chip select signal

SCL: serial clock,

SDA: serial data, 3.3V voltage

FRAME# provided by South Bridge : Frame period signal

TRDY#: ready from the device

IRDY#: The master device is ready for

DEVSEL#: device selection signals




C/BE#(0), C/BE#(1), C/BE(2), C/BE(3), is the command/byte enable signal

OVP is overvoltage protection, OCP is overcurrent protection

INV-PWM is high voltage board drive control signal




CLK: clock INPUT CPU: Initialization RESET: Reset

ADS: Address status BEO#-7#: Byte enable AP: Address even parity

AP: Address even parity DP0-7: Data even parity INIR: Maskable interrupt request

DBSY: Data busy SCYC: Split cycle output HIT#: Hit indication

NMI: Non-maskable interrupt request INV: Invalid input IERR: Internal test error

BREQ: Internal bus occupancy request BUSCHK: Bus check input A20M#: Address bit 20 mask

PWT: Page cache memory write-through PCD: Page cache disable EWBE#: External write buffer input

APCHK#: Address check detection status FLUSH# : Cache cleaning AHOLD: Address occupation request

M/IO#: Memory/IO indication LOCK: Bus blocking SMIACT#: System management interrupt request

SMT#: System management interrupt FERR#: Floating point value error BOFF#: Bus mask

IGNNE#: Ignore value error HLDA: Bus occupation response HOLD: Bus occupation request

NMI: Non-maskable interrupt request

EADS#: Valid external address INIR: Maskable interrupt request KEN#: Cache enable

PCHK#: Parity error enable SDONE: Monitor completion signal SERR: System error report

PAK64: Parity double byte check DEVSEL: Device selection STOP: Stop data transfer




TP_CLK TOUCH PAD CLOCK Touchpad clock signal

TP_DATA TOUCH PAD DATA Touchpad data signal

3S/4S# I don't know

65W/90W# Adapter power identification signal

SBPWR_EN This does not know which voltage is on signal

TV_THERM# Over temperature signal

EC_SPIDI/FWR# BIOS data input signal

EC_SPIDO/FRD# BIOS data output signal

EC_SPICLK BIOS clock synchronization signal

EC_SPICS# BIOS chip select signal

FSTCHG FAST CHARGE fast charging? Uncertain

BATT_GRN_LED# Battery Green Signal

BATT_AMB_LED Battery Yellow SE Flashing Light

CAPS_LED Case Signal PWR_LED

Power Indicator

SYSON Main Voltage On Signal

VR_ON CPU Core Power On Signal

ACIN Power Supply Voltage Detection Signal

EC_RSMRST EC

Reply Signal EC_LID_OUT# Standby Signal

EC_PWROK PG Signal General Give South Bridge

BKOFF# Backlight On Signal




WL_OFF# Wireless On Signal

MEDIA_LED Music Player Shortcut

SATA_LED# SATA Hard Drive Indicator Signal

IDE_LED# IDE hard disk indication signal

EC_SMB_CK[2:1] EC system management bus clock

EC_SMB_CK[2:1] EC system management bus data

PM_SLP_S3# S3 status signal South bridge sends to EC switch signal

PM_SLP_S5# S5 status signal South bridge sent to EC switching signal

LID_SW# Standby signal

PBTN_OUT# EC is sent to the south bridge's power-on signal

FAN_SPEED1 Fan control signal

BT_ON# Bluetooth turn-on signal

ON/OFF Start signal from the switch button '

NUM_LED# Keypad number key signal

PWR_SUSP_LED Standby indicator signal

D The /C# adapter detection signal







Shutdown is short-circuited and SHDN IN should be the shutdown signal input. In general, SHDN shutdown requires an active low.

NO_ASM means no installation.




B+ refers to the power supply of the system power supply voltage. The main power supply after the isolation circuit

is IMVP_PWRGD, which means that the CPU power supply is normal.

PM_PWROK means that the power supply other than the CPU power supply is normal.

VR_ON is the turn-on signal of the VCORE chip.

S5--ON and MAINON S5 state ON ON signal, MAIN main operation ON ON signal

TP is (TEST POINT), convenient for testing and maintenance.




The full name of the VRM is the Voltage Regulator Module. The Chinese meaning is the voltage regulation module. It mainly serves as a stable working voltage for the CPU by controlling the DC->DC (referred to as DC->DC) conversion circuit on the motherboard, and also makes clear requirements for the voltage change and timing of the computer startup. .

AUX generally refers to auxiliary, extended voltage. Generally, the




+3VS is the abbreviation of +3V SYSTEM. It represents the system voltage of 3V, which is the main voltage. Basically, each chip will be used. It is usually turned on later in the power-on sequence. In S3, S4, S5 state is closed.

+3VSUS is an abbreviation for +3V SUSPEND, which is turned on except for S5. The machine wakes up from the SUSPEND state and relies on it.

+VCCP is an abbreviation of VCC PRIMARY, which is similar to +3VS, with different names.

Some boards of +3VA refer to analog voltages, such as powering audio amplifier chips. Some refer to the standby voltage.




The RSMRST# signal is a good signal for the front 3.3v 5v, and the South Bridge needs to receive this signal. Some models have this signal 3.3v before starting the power; some models generate 3.3v this signal to the south bridge when the button is not released. As for who produced it, it depends on the motherboard design, there is IO issued to the South Bridge, there is a circuit .

S3# is standby, S4# is sleep