Регистры H616: TWI Enhance Feature Register

TWI_EFR

9.1.5. TWI Enhance Feature Register - адрес: 0x500201c 0x500241c 0x500281c 0x5002c1c 0x500301c 0x708141c (смещение: 0x001C)

Двухпроводной интерфейс: список регистров

31 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 16
15 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 00

Unused

Bits 31 : 2

DBN

Bits 1 : 0
R/W
0x0

Data Byte Number Follow Read Command Control
00 : No data byte can be written after read command
01 : Only 1 byte data can be written after read command
10 : 2 bytes data can be written after read command
11 : 3 bytes data can be written after read command

Команда U-Boot для чтения регистра

md 500201c 1
md 500241c 1
md 500281c 1
md 5002c1c 1
md 500301c 1
md 708141c 1

Bit fields structure

typedef union twi_efr { struct { unsigned dbn : 2; unsigned unused0 : 30; } b; unsigned long w; } TWI_EFR

Allwinner H616 Manual