JAJSQ97J may 2009 – january 2021 XIO2001
PRODUCTION DATA
The arbiter request mask register enables and disables support for requests from specific masters on the secondary bus. The arbiter request mask register also controls if a request input is automatically masked on an arbiter time-out. See Table 8-54 for a complete description of the register contents.
PCI register offset: | DDh | |
Register type: | Read/Write | |
Default value: | 00h |
BIT NUMBER | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
RESET STATE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BIT | FIELD NAME | ACCESS | DESCRIPTION |
---|---|---|---|
7(1) | ARB_TIMEOUT | RW | Arbiter time-out. This bit enables the arbiter time-out feature. The arbiter time-out is defined as the number of PCI clocks after the PCI bus has gone idle for a device to assert FRAME before the arbiter assumes the device will not respond. |
0 = Arbiter time disabled (default) 1 = Arbiter time-out set to 16 PCI clocks | |||
6(1) | AUTO_MASK | RW | Automatic request mask. This bit enables automatic request masking when an arbiter time-out occurs. |
0 = Automatic request masking disabled (default) 1 = Automatic request masking enabled | |||
5(1) | REQ5_MASK | RW | Request 5 ( REQ5) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 5 (default) 1 = Ignore request 5 | |||
4(1) | REQ4_MASK | RW | Request 4 ( REQ4) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 4 (default) 1 = Ignore request 4 | |||
3(1) | REQ3_MASK | RW | Request 3 ( REQ3) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 3 (default) 1 = Ignore request 3 | |||
2(1) | REQ2_MASK | RW | Request 2 ( REQ2) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 2 (default) 1 = Ignore request 2 | |||
1(1) | REQ1_MASK | RW | Request 1 ( REQ1) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 2 (default) 1 = Ignore request 2 | |||
0(1) | REQ0_MASK | RW | Request 0 ( REQ0) Mask. Setting this bit forces the internal arbiter to ignore requests signal on request input 0. |
0 = Use request 0 (default) 1 = Ignore request 0 |