ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 280

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

IBM3206K0424
IBM Processor for Network Resources
10.5: Timeslot Prescaler Register
This register determines the length of time for one timeslot. This controls the rate that the cell scheduling
counters are incremented. Each clock cycle, the value in this register is added to a 24-bit counter. When the
upper bit of the counter changes state, the Current Timeslot Counter is incremented. This should normally be
set to the time it takes to transmit one cell. It will be initialized to the cell time for a 622 Mb/s SONET connec-
tion (599.04 Mb/s payload). The following formula should be used to determine the value to load in this regis-
ter: Timeslot Prescaler = (clock interval/timeslot interval) x 2∗∗23.
Length
Type
Address
Power On Value
Restrictions
10.6: Current Timeslot Counter
This counter contains a count of how many prescaled intervals have elapsed. It is used to determine if sched-
uling needs to be done or credits exist.
Length
Type
Address
Power On Value
Restrictions
Transmit Buffer (CSKED)
Page 280 of 676
23 22 21 20 19 18 17 16 15 14 13 12 11 10
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Bit(s)
Bit(s)
23-0
31-0
This value will determine the rate at which the Current Timeslot Counter is advanced.
This value represents how many expirations have occurred since the counter rolled over.
24 bits
Read/Write
XXXX 1210
X’02B67C’
This register should be written only at initialization time.
32 bits
Read/Write
XXXX 1218
X’0000 0000’
This register is meant to be read only. It is writable for diagnostic purposes only.
Timeslot Counter Rate
Elapsed Interval Count
9
8
7
Description
Description
6
5
4
3
2
1
9
0
8
7
6
5
4
pnr25.chapt05.01
August 14, 2000
3
Preliminary
2
1
0