Version: Next

2.1 Functional parameters

2.1.1 Summary

PW400 is the version of PowerWriter series RISC-V, which supports debugging of RISC-V series chips (Nuclei kernel), as well as in-circuit programming of RISC-V series chips, offline programming, machine burn-in and other functional features.

tip

LCM 8051 series chips are supported on PW400 series at the same time.

2.1.2 Parameters

Size : 92.000mm 56.000mm 16.000mm
Operating voltage ： DC5V
Power Consumption： 30mA@5V~100mA@5V
Driving ability： 5V@700mA (Max)

2.1.3 Signal description

The PowerWriter interface is a mix of burner station signals, standard serial port signals, BOOT0 control, and power supply (the power supply supports outputs of 1.8V, 3.3V, 5.0V, and can also be used as an input reference to the PowerWriter logic levels), as illustrated in Section 2.1.2.

Pin Name	Pin Function
VEXT (VREF)	Target chip VDDIO reference voltage
GND	Power Ground Wire
TRST	JTAG TAP Reset Control
TDI	JTAG TDI Data Line
TMS	JTAG TMS Mode Selection Line
TCK	JTAG TCK Clock Line
RTCK	JTAG RTCK Reference Clock
TDO	JTAG TDO Data Line
RESET	Chip's Reset pin
ISP_TX	Standard serial port, ISP burn-in, etc.
ISP_RX	Standard serial port, ISP burn-in, etc.
BOOT0	BOOT0 boot mode can be controlled
STA-BUSY	Offline busy output (output high)
STA-OK	Offline successful output (high output)
STA-NG	Offline Failure Output (Output High)
START	Machine start signal (low pulse start)

tip

VEXT is the target chip's IO reference voltage (VDDIO), alias VREF, which can be set to 1.8V, 3.3V, 5.0V, or external reference input.

2.1.4 State Definition

Signal Name	Signal Description
POWER LED	Always on at power-up.
STATUS LED	Lamp does not light up during power-on without operation.
	Blinks when communicating with the application software, the blinking frequency follows the communication speed setting.
	Blinking during offline burning, blinking frequency follows the communication speed setting.
	When connected to the target chip, it will always light up.
NG LED	Lights up when there is an operation error, or when an operation such as reading, erasing, or programming fails, and goes out until a new operation is performed.
OK LED	Lights up when a read, erase, program, etc. operation is successful and goes out when a new operation is performed.
Buzzer Frequency Definition	The PWM frequency is 2.7K Hz (defined below).
Buzzer count definition	Beep sound at power-on without operation.
	One beep when the target chip is connected.
	Two beeps when programming is successful or downloading offline files is successful.
	Three beeps when the operation fails.
	When the offline programming count is 0, four ticks are heard.
Button	Effective for offline programming (release trigger, ignore long press for longer than 1S).
OK signal	Output high when offline operation is successful, clear 0 when there is a new operation.
NG signal	Output high when offline operation fails, clear 0 when new operation is performed.
BUSY signal	Output high when offline is being programmed.
START signal	Input a low signal >= 40ms to initiate an offline programming.

2.1.5 Characteristics

tip

The features listed above are typical, but please refer to the PowerWriter User's Manual for more information.

For product differences, please see PowerWriter product selection

2.1.1 Summary
2.1.2 Parameters
2.1.3 Signal description
2.1.4 State Definition
2.1.5 Characteristics

2.1 Functional parameters

2.1.1 Summary​

2.1.2 Parameters​

2.1.3 Signal description​

2.1.4 State Definition​

2.1.5 Characteristics​

2.1.1 Summary

2.1.2 Parameters

2.1.3 Signal description

2.1.4 State Definition

2.1.5 Characteristics