Usb Endpoint 0 Transfer Count Register - Usbep0Tcr - Holtek HT32F12345 User Manual

32-Bit Arm ® Cortex ® -M3 MCU
HT32F12345
USB Endpoint 0 Transfer Count Register – USBEP0TCR
This register specifies the Endpoint 0 data transfer byte count.
Offset: 0x020
Reset value: 0x0000_0000
31
Type/Reset
23
Reserved
Type/Reset RO
15
Type/Reset
7
Reserved
Type/Reset RW
Bits Field Descriptions
[22:16] RXCNT Reception Byte Count
The bit field contains the number of data bytes received by Endpoint 0 in the
preceding SETUP transaction.
[6:0] TXCNT Transmission Byte Count
The bit field contains the number of data bytes to be transmitted by Endpoint 0 in the
next IN token. If the value of this field is zero, it indicates that a zero length packet will
be sent.
Rev. 1.10
30 29 28
22 21 20
0 RO 0 RO
14 13 12
6 5 4
0 RW 0 RW
483 of 590
27 26
Reserved
19 18
RXCNT
0 RO 0 RO 0 RO
11 10
Reserved
3 2
TXCNT
0 RW 0 RW 0 RW
25 24
17 16
0 RO 0
9 8
1 0
0 RW 0
November 28, 2018