mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 279

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

System Interface Unit
Bits 16–31—Reserved
These bits are reserved and must be set to 0.
12.3.3.4 SIU INTERRUPT VECTOR REGISTER. The 32-bit read-only SIU interrupt vector
(SIVEC) register contains an 8-bit code that represents the unmasked interrupt source of
the highest priority level. The SIVEC register can be read as either a byte, half, or word.
When read as a byte, a branch table can be used in which each entry contains one
instruction (branch). When read as a half-word, each entry can contain a full routine of 256
instructions (max). The interrupt code is equal to the interrupt number multiplied by four,
which allows indexing into the table. Refer to Figure 12-3 and Table 12-1 for details.
INTC—Interrupt Code
This field indicates the highest priority pending interrupt.
Bits 8–31—Reserved
These bits are reserved and must be set to 0. The value equals the interrupt number
multiplied by four. See Table 12-1 for details.
SIVEC
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
16
0
17
1
18
2
Freescale Semiconductor, Inc.
For More Information On This Product,
19
3
INTC
R
0
20
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
21
5
(IMMR & 0xFFFF0000) + 0x01C
(IMMR & 0xFFFF0000) + 0x01E
22
6
RESERVED
23
7
R
0
24
8
25
9
10
26
RESERVED
11
27
R
0
12
28
13
29
MOTOROLA
14
30
15
31