Base Address
0x0000	SFP
0x1000	ADC
0x2000	SIU
0x3000	TempSensor

SFP

Offset	R/W
0		W	Bit0 SCL, Bit1 SDA, Bit2 SDA enable (1-on,0-tri-stated)
0		R   Bits0..2 see above, Bit3 SDA read back, Bit4 SFP Present


ADC
Offset
0		R	Ch0 (Bits 11..0) and Ch1 (Bits 27..16)
1		R	Ch2 (Bits 11..0) and Ch3 (Bits 27..16)
2		R	Ch4 (Bits 11..0) and Ch5 (Bits 27..16)
3		R	Ch6 (Bits 11..0) and Ch1 (Bits 27..16) and tc (Bits 31..30)
3		W	tc (Bits 1..0), acc_clear (Bit 2)

tc : time constant for integration, 0 fastest, 3 slowest

Ch0 - 5V
Ch1 - ext.
Ch2 - 1.5V
Ch3 - 3.3V digital
Ch4 - 3.3V analog
Ch5 - 2.5V analog
Ch6 - 2.5V digital

All voltages first divided by 2, then mapped to 12 bit with Vref=3.3V

SIU
Offset
0		RW	dout
1		RW	foBSY_n (Bit2), fbICTRL (Bit1), fbIEN (Bit0)
2		R	din
3		R	fiLF_n (Bit4), fiDIR (Bit3), fiBEN_n (Bit2), fbOCTRL (Bit1), fbOEN (Bit0)

TempSensor DS18B20
Offset
0		R rTsens (Bits 15..0), rt (Bits 31..16).

rTsens : temp. sensor readback
rt : thresholds read back, both programmed as 0
The resolution is fixed to "11" (max) => 12 bits (signed).
T = signed(rTsens)/2**4