Gros plan sur le programmateur USBasp H6 de Betemcu

La pub du programmateur USBasp H6 (www.betemcu.cn)

Un programmateur est très utile pour nos petits développements Arduino. Je note ici pour archive quelques infos concernant le programmateur USBasp H6 de Betemcu. Il s'agit d'un petit programmateur USB parmi les nombreux modèles de ce genre. Il est livré avec une nappe et un connecteur 6 pin pour relier à la carte USB au microcontrôleur à programmer.
Avantages de ce modèle ? Le prix : on le trouve facilement pour 3 ou 4 euros.
Désavantages ? Pas de notice d'utilisation et une installation pas toujours évidente sous Windows (cf. Charger un driver pour programmateur USBasp sur Windows 10). Mais surtout il n'y a pas de possibilité de passer du 5v au 3.3v (ce qui sera un critère déterminant si je dois un jour acheter un nouveau programmateur). Donc... choisir un autre modèle à l'avenir.

Voici ce que ça donne quand on y regarde de plus près :

C'est ici qu'on se rend compte que le titre de l'article est vraiment bien choisi :-)

Le descriptif  de l'USBasp H6 de Betemcu
(enregistré ici comme archive à défaut d'un vrai datasheet) :

Overcurrent protection with a high performance 500mA resettable fuse to protect your computer motherboard.

USB interface for 5V power to download and target board, in case short-circuited, computer motherboard dangerous. USB power port plus a 500 mA self resettable fuse to prevent damage to the computer USB port (USB port overcurrent protection, but more than a protection more secure). When the output current is greater than 500 mA (overcurrent or short circuit), will immediately cut off the current resettable fuse to protect the computer motherboard. When the lifting of the short-circuit, self-resettable fuse will automatically return to normal conditions, the programmer can continue normal use!

Specifically designed for notebook computers, the ad hoc two 3.6V regulator, a perfect match, get rid of the hidden dangers of instability of the hardware circuit level !

Hardware circuit design, does not simplify out any effect on the stability of the devices, especially the 3.6V regulator is determined not to province, to ensure that the level matching. PCB in accordance with the standards of high-speed board design, first-class stability. 10-pin isp socket mount one on the board, on the one hand, space-saving and beautiful, the most critical is not with the multiple plug and loose.
 
BAITE special carefully selected firmware super automatic speed control function, to obtain the best balance between stability and speed!

USBASP and parallel port download cable, and its internal firmware. Firmware version, good or bad is different, the public version of the firmware to governor jumper two steps of the governor, inconvenient and speed rating; we have carefully selected and modified the firmware to achieve multi-level automatic speed control.

An example: AVR microcontroller factory was a 1MHz internal oscillator circuit, then the firmware with a lower speed automatically download its download about 4K program shall 3 seconds; for the same model using an external 12MHz crystal microcontroller, the clock speed up can support higher download speed, download the same program, the firmware automatically accelerated, the download only to be less than one second. The above experiment reflects the automatic speed control, customers can verify their own !
 
Supported microcontrollers include:
AT89S51,AT89S52 AT86RF401,AT90CAN32,AT90CAN64,AT90CAN128, AT90PWM2,AT90PWM2B,AT90PWM3,AT90PWM3B, AT90PWM81,AT90PWM216,AT90PWM316,AT90S1200, AT90S2313,AT90S2323,AT90S2343,AT90S4414,AT90S4433, AT90S4434,AT90S8515,AT90S8535,AT90SCR100H,AT90USB82, AT90USB162,AT90USB646,AT90USB647,AT90USB1286,AT90USB1287, ATmega8,ATmega8A,ATmega8U2,ATmega8HVA,ATmega16,ATmega16A, ATmega16HVA,ATmega16HVB,ATmega16M1,ATmega16U2,ATmega16U4, ATmega32,ATmega32A,ATmega32C1,ATmega32HVB,ATmega32M1,ATmega32U2, ATmega32U4,ATmega32U6,ATmega48,ATmega48P,ATmega48PA,ATmega64,ATmega64A, ATmega64C1,ATmega64M1,ATmega88,ATmega88P,ATmega88PA,ATmega103,ATmega128, ATmega128A,ATmega128RFA1,ATmega161,ATmega162,ATmega163,ATmega164P,ATmega164PA, ATmega165,ATmega165P,ATmega168,ATmega168P,ATmega168PA,ATmega169,ATmega169P, ATmega323,ATmega324,ATmega324PA,ATmega325,ATmega325P,ATmega328P,ATmega329, ATmega329P,ATmega406,ATmega640,ATmega644,ATmega644P,ATmega644PA,ATmega645, ATmega649,ATmega1280,ATmega1281,ATmega1284P,ATmega2560,ATmega2561,ATmega3250, ATmega3250P,ATmega3290,ATmega3290P,ATmega6450,ATmega6490,ATmega8515,ATmega8535, ATtiny10,ATtiny11,ATtiny12,ATtiny13,ATtiny13A,ATtiny15,ATtiny22,ATtiny24,ATtiny24A, ATtiny25,ATtiny26,ATtiny28,ATtiny43U,ATtiny44,ATtiny44A,ATtiny45,ATtiny48,ATtiny84, ATtiny85,ATtiny88,ATtiny167,ATtiny261,ATtiny261A,ATtiny461,ATtiny861,ATtiny861A,ATtiny2313,ATtiny2313A