mcs7830 MosChip, mcs7830 Datasheet - Page 27

• Manufacturer Part Number: mcs7830
• Description: Usb-2.0 To Ethernet
• Manufacturer: MosChip

Rev.
Frame Drop Counter Register
(HIF_REG22):
This register is used to store the frames dropped by the bridge in the receive path. The default value present
in this register is 0x00. When ever a frame is dropped by the bridge this register is incremented by one. The
contents of this register goes up to 0xFF and stops. Software can read the count and when it reaches 0xFF,
the counter must be cleared by the software by writing 0x00 to this register.
Pause Threshold Register
(HIF_REG23):
Notes:
1. On reset, all HIF_REG23 bits are set to zero.
2. This register can be modifi ed from the Windows registry. The value should be written immediately after the
USB device detection.
3.1
Bit-7
Bit
2:0
5:3
6
7
Unused
Threshold difference.
000: 0
001: 128 word
010: 256 word
011: 384 word
100: 512 word
101: 640 word
110: 700 word
111: 758 word
Pause threshold.
000: 1516 word
001: 758 word
010: 1000 word
011: 1600 word
100: 1650 word
101: 1700 word
110: 1800 word
111: 2000 word
Unused
Pause control.
0: Enable pause.
1: Disable pause.
Bit-6
Bit-5
Determines second
threshold value
Bit-4
Description
Bit-3
Bit-2
Determines pause threshold
MCS7830
USB-2.0 to Ethernet
Bit-1
Bit-0
Page 27