11-28
MPC8240 Integrated Processor User’s Manual
Register Definitions
Figure 11-18 shows the bits of the IACK.
Figure 11-18. Processor Interrupt Acknowledge Register (IACK)
Table 11-25 shows the bit settings of the IACK.
11.9.10 Processor End-of-Interrupt Register (EOI)
A write to the EOI signals the end of processing for the highest priority interrupt currently
in service by the processor. The write to EOI updates the ISR by retiring the highest priority
interrupt. Data values written to this register are ignored, and zero is assumed. Reading this
register returns zeros (this register is considered write-only). Figure 11-19 shows the bits
of the EOI.
Figure 11-19. Processor End of Interrupt Register (EOI)
Table 11-26 shows the bit settings for the EOI.
Table 11-25. IACK Field Descriptions—Offset 0x6_00A0
Bits
Name
Reset
Value
Description
31–8
—
All 0s
Reserved
7–0
VECTOR
0x0
Interrupt vector. When this register is read, this field returns the vector of the
highest pending interrupt in the EPIC unit.
Table 11-26. EOI Field Descriptions—Offset 0x6_00B0
Bits
Name
Reset
Value
Description
31–4
—
—
Reserved
3–0
EOI_CODE
—
0000
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VECTOR
31
8
7
0
Reserved
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
EOI_CODE
31
4
3
0
Reserved
Summary of Contents for MPC8240
Page 1: ...MPC8240UM D Rev 1 1 2001 MPC8240 Integrated Processor User s Manual ...
Page 38: ...xviii MPC8240 Integrated Processor User s Manual TABLES Table Number Title Page Number ...
Page 48: ...xlviii MPC8240 Integrated Processor User s Manual Acronyms and Abbreviations ...
Page 312: ...6 94 MPC8240 Integrated Processor User s Manual ROM Flash Interface Operation ...
Page 348: ...7 36 MPC8240 Integrated Processor User s Manual PCI Host and Agent Modes ...
Page 372: ...8 24 MPC8240 Integrated Processor User s Manual DMA Register Descriptions ...
Page 394: ...9 22 MPC8240 Integrated Processor User s Manual I2O Interface ...
Page 412: ...10 18 MPC8240 Integrated Processor User s Manual Programming Guidelines ...
Page 454: ...12 14 MPC8240 Integrated Processor User s Manual Internal Arbitration ...
Page 466: ...13 12 MPC8240 Integrated Processor User s Manual Exception Latencies ...
Page 516: ...16 14 Watchpoint Trigger Applications ...
Page 538: ...B 16 MPC8240 Integrated Processor User s Manual Setting the Endian Mode of Operation ...
Page 546: ...C 8 MPC8240 Integrated Processor User s Manual ...
Page 640: ...INDEX Index 16 MPC8240 Integrated Processor User s Manual ...