ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 504

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

IBM3206K0424
IBM Processor for Network Resources
18.6: PPOCM DMA Length Register
This register provides the DMA controller the length of the DMA. The maximum DMA length in real address-
ing mode is X’00010000’ (64K). The maximum DMA length in virtual addressing mode is X’00001000’ (4K).
Length
Type
DCR Address
Power on Value
Restrictions
18.7: PPOCM DMA Timeout Timer Register
This register is compared to a timer that begins running when bit 0 of the control register is set to ’1’. When
the timer reaches the value in this register, the DMA is terminated and a status bit is set. The default value of
X'FFFFFF' results in a timeout value of 125 ms.
Length
Type
DCR Address
Power on Value
Restrictions
PowerPC On-Chip Memory (PPOCM) Entity
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31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
31-16
31-24
Bit(s)
Bit(s)
16-0
23-0
Reserved
Reserved
DMA Length
Reserved
DMA Length
Name
Name
Reserved
32 bits
Read/Write
108
X’00000000’
None
32 bits
Read/Write
109
X’00FFFFFF’
None
Reserved
Only bits 16-3 are writable as DMAs are done only in eight-byte segments.
Reserved
DMA timeout value
DMA Length
Description
Description
DMA Length
8
8
7
7
6
6
5
5
4
4
pnr25.chapt05.01
August 14, 2000
3
3
Preliminary
2
2
1
1
0
0