C8051T322-GQR Silicon Labs, C8051T322-GQR Datasheet - Page 160

• Manufacturer Part Number: C8051T322-GQR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-LQFP32
• Manufacturer: Silicon Labs

Specifications of C8051T322-GQR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

C8051T620/621/320/321/322/323
SFR Definition 23.3. USB0DAT: USB0 Data
SFR Address = 0x97
160
Name
Reset
7:0
Bit
Type
Bit
USB0DAT[7:0] USB0 Data Bits.
Name
7
0
This SFR is used to indi-
rectly read and write
USB0 registers.
6
0
Description
5
0
Rev. 1.1
USB0DAT[7:0]
4
0
Write Procedure:
1. Poll for BUSY
(USB0ADR.7) => 0.
2. Load the target USB0
register address into the
USBADDR bits in register
USB0ADR.
3. Write data to USB0DAT.
4. Repeat (Step 2 may be
skipped when writing to
the same USB0 register).
R/W
Write
3
0
2
0
Read Procedure:
1. Poll for BUSY
(USB0ADR.7) => 0.
2. Load the target USB0
register address into the
USBADDR bits in register
USB0ADR.
3. Write 1 to the BUSY bit
in register USB0ADR
(steps 2 and 3 can be per-
formed in the same write).
4. Poll for BUSY
(USB0ADR.7) => 0.
5. Read data from
USB0DAT.
6. Repeat from Step 2
(Step 2 may be skipped
when reading the same
USB0 register; Step 3 may
be skipped when the
AUTORD bit
(USB0ADR.6) is logic 1).
1
0
Read
0
0