C8051T622-GMR Silicon Labs, C8051T622-GMR Datasheet - Page 123
C8051T622-GMR
Manufacturer Part Number
C8051T622-GMR
Description
8-bit Microcontrollers - MCU USB-OTP-16K-QFN24
Manufacturer
Silicon Labs
Datasheet
1.C8051T622-GMR.pdf
(254 pages)
Specifications of C8051T622-GMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051T622-GMR
Manufacturer:
SILICON
Quantity:
5 000
- Current page: 123 of 254
- Download datasheet (2Mb)
USB Register Definition 18.4. INDEX: USB0 Endpoint Index
USB Register Address = 0x0E
18.4. USB Clock Configuration
USB0 is capable of communication as a Full or Low Speed USB function. Communication speed is
selected via the SPEED bit in SFR USB0XCN. When operating as a Low Speed function, the USB0 clock
must be 6 MHz. When operating as a Full Speed function, the USB0 clock must be 48 MHz. Clock options
are described in Section “16. Oscillators and Clock Selection” on page 86. The USB0 clock is selected via
SFR CLKSEL (see SFR Definition 16.1).
Clock Recovery circuitry uses the incoming USB data stream to adjust the internal oscillator; this allows
the internal oscillator to meet the requirements for USB clock tolerance. Clock Recovery should be used in
the following configurations:
When operating USB0 as a Low Speed function with Clock Recovery, software must write 1 to the CRLOW
bit to enable Low Speed Clock Recovery. Clock Recovery is typically not necessary in Low Speed mode.
Single Step Mode can be used to help the Clock Recovery circuitry to lock when high noise levels are pres-
ent on the USB network. This mode is not required (or recommended) in typical USB environments.
Name
Reset
Bit
7:4
3:0
Type
Bit
EPSEL[3:0]
Unused
Name
R
7
0
Communication Speed
Unused. Read = 0000b. Write = don’t care.
Endpoint Select Bits.
These bits select which endpoint is targeted when indexed USB0 registers are
accessed.
0000: Endpoint 0
0001: Endpoint 1
0010: Endpoint 2
0011-1111: Reserved.
R
6
0
Low Speed
Full Speed
R
5
0
C8051T622/3 and C8051T326/7
Rev. 1.1
R
4
0
Function
Internal Oscillator / 8
Internal Oscillator
3
0
USB Clock
2
0
EPSEL[3:0]
R/W
1
0
0
0
123
Related parts for C8051T622-GMR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT EVALUATION FOR CP2102
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
KIT EVAL FOR CP2103 USB TO UART
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
KIT EVAL FOR CP2201 ETH CTRLR
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DAUGHTER CARD CAP TOUCH SENSE
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
KIT STARTER CAP TOUCH SENSE
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT FOR C8051F320/F321
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEVKIT-F120/21/22/23/24/25/26/27
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT FOR C8051F310/F311
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT F220/221/226/230/231/236
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT F300/301/302/303/304/305
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT FOR C8051F330/F331
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT FOR F005/006/007
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
DEV KIT FOR F020/F021/F022/F023
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
KIT DEV FOR C8051F34X
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
KIT DEV FOR C8051F41X
Manufacturer:
Silicon Laboratories Inc
Datasheet: