Cypress EZ-USB FX3 User Manual

EZ-USB FX3 Technical Reference Manual, Document Number: 001-76074 Rev. *F 401
DEV_EPI_XFER_CNT
0xE0031458
10.11.7 DEV_EPI_XFER_CNT
IN Endpoint Remaining Transfer Length Register
There are 16 DEV_EPI_XFER_CNT registers. The address of each is calculated as DEV_EPI_XFER_CNT(x) = 0xE0031458
+ (x*0x4). Hence DEV_EPI_XFER_CNT(0) is at address 0xE0031458, DEV_EPI_XFER_CNT(1) is at address 0xE0031458 +
0x4 and so on. The definition of each of these is the same.
This register counts down the remaining bytes left in the transfer.
23:0 BYTES_REMAINING[23:0] Number of bytes remaining in the transfer. This value will never go negative (if more bytes are trans-
ferred than remaining in counter, counter value stays at 0). The value in this register is used only for
generating the DONE interrupt for the endpoint, and does not affect the actual data transfers.
DEV_EPI_XFER_CNT IN Endpoint Remaining Transfer Length Register 0xE0031458
b31 b30 b29 b28 b27 b26 b25 b24
DEV_EPI_XFER_CNT IN Endpoint Remaining Transfer Length Register
b23 b22 b21 b20 b19 b18 b17 b16
BYTES_REMAINING[23:16]
R/W R/W R/W R/W R/W R/W R/W R/W
R/W R/W R/W R/W R/W R/W R/W R/W
00000000
DEV_EPI_XFER_CNT IN Endpoint Remaining Transfer Length Register
b15 b14 b13 b12 b11 b10 b9 b8
BYTES_REMAINING[15:8]
R/W R/W R/W R/W R/W R/W R/W R/W
R/W R/W R/W R/W R/W R/W R/W R/W
00000001
DEV_EPI_XFER_CNT IN Endpoint Remaining Transfer Length Register
b7 b6 b5 b4 b3 b2 b1 b0
BYTES_REMAINING[7:0]
R/W R/W R/W R/W R/W R/W R/W R/W
R/W R/W R/W R/W R/W R/W R/W R/W
00000000
Bit Name Description

Cypress EZ-USB FX3 Specifications

General

Brand	Cypress
Model	EZ-USB FX3
Category	Controller
Language	English