C8051T322-GQR Silicon Labs, C8051T322-GQR Datasheet - Page 183

• 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

USB Register Definition 23.21. EINCSRH: USB0 IN Endpoint Control High
USB Register Address = 0x12
23.13. Controlling Endpoints1-3 OUT
Endpoints1-3 OUT are managed via USB registers EOUTCSRL and EOUTCSRH. All OUT endpoints can
be used for Interrupt, Bulk, or Isochronous transfers. Isochronous (ISO) mode is enabled by writing 1 to the
ISO bit in register EOUTCSRH. Bulk and Interrupt transfers are handled identically by hardware.
An Endpoint1-3 OUT interrupt may be generated by the following:
1. Hardware sets the OPRDY bit (EINCSRL.0) to 1.
2. Hardware generates a STALL condition.
Name
Reset
1:0
Type
Bit
7
6
5
4
3
2
Bit
DIRSEL
Unused
Unused
DBIEN
Name
FCDT
SPLIT
ISO
DBIEN
R/W
7
0
IN Endpoint Double-buffer Enable.
0: Double-buffering disabled for the selected IN endpoint.
1: Double-buffering enabled for the selected IN endpoint.
Isochronous Transfer Enable.
This bit enables/disables isochronous transfers on the current endpoint.
0: Endpoint configured for bulk/interrupt transfers.
1: Endpoint configured for isochronous transfers.
Endpoint Direction Select.
This bit is valid only when the selected FIFO is not split (SPLIT = 0).
0: Endpoint direction selected as OUT.
1: Endpoint direction selected as IN.
Unused. Read = 0b. Write = don’t care.
Force Data Toggle Bit.
0: Endpoint data toggle switches only when an ACK is received following a data packet
transmission.
1: Endpoint data toggle forced to switch after every data packet is transmitted, regard-
less of ACK reception.
FIFO Split Enable.
When SPLIT = 1, the selected endpoint FIFO is split. The upper half of the selected
FIFO is used by the IN endpoint; the lower half of the selected FIFO is used by the OUT
endpoint.
Unused. Read = 00b. Write = don’t care.
R/W
ISO
6
0
DIRSEL
R/W
5
0
C8051T620/621/320/321/322/323
Rev. 1.1
R
4
0
Function
FCDT
R/W
3
0
SPLIT
R/W
2
0
R
1
0
R
0
0
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