C8051F321-GMR Datasheet, PDF (145/250 Pages) Silicon Laboratories – Full Speed USB, 16 k ISP FLASH MCU Family

C8051F320/1
Table 15.2. USB0 Controller Registers (Continued)
USB Register
Name
E0CSR
EINCSRL
EINCSRH
EOUTCSRL
EOUTCSRH
E0CNT
EOUTCNTL
EOUTCNTH
USB Register
Address
0x11
0x12
0x14
0x15
0x16
0x17
Description
Indexed Registers
Endpoint0 Control / Status
Endpoint IN Control / Status Low Byte
Endpoint IN Control / Status High Byte
Endpoint OUT Control / Status Low Byte
Endpoint OUT Control / Status High Byte
Number of Received Bytes in Endpoint0 FIFO
Endpoint OUT Packet Count Low Byte
Endpoint OUT Packet Count High Byte
Page Number
160
163
164
166
167
161
167
167
USB Register Definition 15.4. INDEX: USB0 Endpoint Index
R
R
R
R
R/W
R/W
R/W
R/W
Reset Value
-
-
-
-
EPSEL
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0 USB Address:
0x0E
Bits7–4: Unused. Read = 0000b; Write = don’t care.
Bits3–0: EPSEL: Endpoint Select
These bits select which endpoint is targeted when indexed USB0 registers are accessed.
INDEX
0x0
0x1
0x2
0x3
0x4–0xF
Target Endpoint
0
1
2
3
Reserved
Rev. 1.4
145