31. USB 1wire hub

Status: OK

Low speed USB device which can handle multiple 1wire buses. Example program: onewire_demo.py under softusbduino

Based on V-USB hardware.

connections:

function	AVR pin	Arduino pin
1wire	PC0	A0
1wire	PC1	A1
1wire	PC2	A2
1wire	PD5	D5
1wire	PD6	D6
1wire	PD7	D7
USB D-	PD0	D0
USB D+	PD2	D2

V-USB defines:

#define USB_CFG_IOPORTNAME      D
#define USB_CFG_DMINUS_BIT      0
#define USB_CFG_DPLUS_BIT       2

31.1. Schematic

31.2. Board

Normal, bottom mirrored, wires only:

31.3. Partlist

part	value	position
C1	4u7	(0.9 1.05)
C3	100n	(1.2 1.05)
C4	22p	(1 0.95)
C5	22p	(1.1 0.9)
D1	3V6	(0.6 1.15)
D2	3V6	(0.7 1.1)
D3	5V1	(0.7 0.4)
D4	5V1	(0.9 0.45)
D5	5V1	(1.1 0.5)
D6	5V1	(1.9 0.5)
D7	5V1	(1.8 0.8)
D8	5V1	(1.7 0.5)
IC1		(1.45 1.05)
JP1		(2 1.15)
Q1	12MHz	(0.8 0.85)
R1	68	(0.9 1.4)
R2	68	(0.7 1.35)
R3	2k2	(0.8 1.15)
R4	4k7	(1.7 1.5)
R5	4k7	(1.8 1.55)
R6	10k	(1.1 1.4)
R7	4k7	(1.9 1.6)
R8	4k7	(1.2 0.45)
R9	4k7	(1 0.4)
R10	4k7	(0.8 0.35)
X1		(0.3 1.15)

31.4. 3D view

31.4.1. Front

31.4.2. Right side

31.4.3. Left side

31.4.4. Bottom