C8051F326-TB Silicon Laboratories Inc, C8051F326-TB Datasheet - Page 90
C8051F326-TB
Manufacturer Part Number
C8051F326-TB
Description
BOARD PROTOTYPING W/C8051F326
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.C8051F326-TB.pdf
(140 pages)
Specifications of C8051F326-TB
Contents
Board
Processor To Be Evaluated
C8051F326/F327
Interface Type
USB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F326
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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C8051F326/7
12.3. USB Register Access
The USB0 controller registers listed in Table 12.2 are accessed through two SFRs: USB0 Address
(USB0ADR) and USB0 Data (USB0DAT). The USB0ADR register selects which USB register is targeted
by reads/writes of the USB0DAT register. See Figure 12.2.
Endpoint control/status registers are accessed by first writing the USB register INDEX with the target end-
point number. Once the target endpoint number is written to the INDEX register, the control/status registers
associated with the target endpoint may be accessed. See the “Indexed Registers” section of Table 12.2
for a list of endpoint control/status registers.
Important Note: The USB clock must be active when accessing USB registers.
90
USB0ADR
USB0DAT
SFRs
8051
Figure 12.2. USB0 Register Access Scheme
Rev. 1.1
Registers
Registers
Common
Interrupt
Register
Access
Index
FIFO
USB Controller
Endpoint0 Control/
Endpoint1 Control/
Status Registers
Status Registers
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