tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 316
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tmpr4937
Manufacturer Part Number
tmpr4937
Description
64-bit Tx System Risc
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMPR4937.pdf
(552 pages)
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Bit
4:0
Mnemonic
CPAS
Current PCI Bus
Arbiter State
Field Name
Figure 10.4.28 PCI Bus Arbiter Current State Register (2/2)
Current PCI Bus Arbiter State (Default: 0x00)
Displays the State Machine that was selected by the FSM bit.
Please refer to Figures 12.5.3 and 12.11.1 for an explanation of
Agent/Grant A - W and Level 2.
When FSM =1:
0x00: Preparation state for transferring bus ownership to PCI Agent A.
0x01: State in which Grant A is provided to PCI Agent A when PCI Bus
0x02: State in which Grant A is provided to PCI Agent A when PCI Bus
0x03: The agent that was provided Grant A exists in this state. If there is
0x04: Preparation state for transferring bus ownership to PCI Agent B.
0x05: State in which Grant B is provided to PCI Agent B when PCI Bus
0x06: State in which Grant B is provided to PCI Agent B when PCI Bus
0x07: The agent that was provided Grant B exists in this state. If there is
0x08: Preparation state for transferring bus ownership to PCI Agent C.
0x09: State in which Grant C is provided to PCI Agent C when PCI Bus
0x0A: State in which Grant C is provided to PCI Agent C when PCI Bus
0x0B: The agent that was provided Grant C exists in this state. If there is
0x0C: Preparation state for transferring bus ownership to PCI Agent D.
0x0D: State in which Grant D is provided to PCI Agent D when PCI Bus
0x0E: State in which Grant D is provided to PCI Agent D when PCI Bus
0x0F: The agent that was provided Grant D exists in this state. If there is
0x10: Preparation state for transferring bus ownership to PCI Agent Level
0x11: State in which Grant Level 2 is provided to PCI Agent Level 2 when
0x12: State in which Grant Level 2 is provided to PCI Agent Level 2 when
0x13: The agent that was provided Grant Level 2 exists in this state. If
When FSM=0, the FSM=1 description is replaced as follows: A→W, B→X,
C→Y, D→Z, Level 2→N/A.
ownership is being held elsewhere.
ownership is not being held elsewhere.
bus ownership, the PCI Bus Arbiter transfers bus ownership to
another agent.
ownership is being held elsewhere.
ownership is not being held elsewhere.
bus ownership, the PCI Bus Arbiter transfers bus ownership to
another agent.
ownership is being held elsewhere.
ownership is not being held elsewhere.
bus ownership, the PCI Bus Arbiter transfers bus ownership to
another agent.
ownership is being held elsewhere.
ownership is not being held elsewhere.
bus ownership, the PCI Bus Arbiter transfers bus ownership to
another agent.
2.
PCI Bus ownership is being held elsewhere.
PCI Bus ownership is not being held elsewhere.
there is bus ownership, the PCI Bus Arbiter transfers bus ownership
to another agent.
10-58
Description
Chapter 10 PCI Controller
Read/Write
R
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