ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 436

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
16.2: CHKSM Read/Write Count Register
The CHKSM Read/Write Count Register indicates the count of remaining bytes of a checksum operation.
This register keeps track of how many bytes remain in the current checksum operation and is decremented
with each read or write operation.
Any length can be set in the 30 lower significant bits.
The upper two bits of this register can be written when starting a checksum operation instead of writing the
control register.
Length
Type
Address
Power On Value
Restrictions
On-chip Checksum and DRAM Test Support (CHKSM)
Page 436 of 676
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Bit(s)
31
30
ST-CK
Name
CL-IP
Start a checksum operation. When this bit is written, bits 0 and 1 in the control register are set, and a check-
sum operation is started. This should only be done when the rest of the control register bits are already set
up. (That is, memory select, invert checksum,...)
When this bit is written, it will clear the CHKSM TCP/IP Checksum Data Register. This is the same as writing
a ’1’ to bit 6 of the CHKSM Control Register.
32 bits
Read/Write
XXXX 0A04
X’00000000’
Can only be written when CHKSM is not enabled (see EE bit in CHKSM Control
Register on page 440)
Remaining Bytes
Description
9
8
7
6
5
4
pnr25.chapt05.01
August 14, 2000
3
Preliminary
2
1
0