
ColdFire Core
Freescale Semiconductor
3-9
3.2.7
Access Control Registers (ACRn)
The access control registers define attributes for user-defined memory regions. These attributes include the
definition of cache mode, write protect, and buffer write enables. The ACRs are described in
“Access Control Registers (ACR0–ACR1).”
3.2.8
Vector Base Register (VBR)
The VBR contains the base address of the exception vector table in memory. To access the vector table,
the displacement of an exception vector is added to the value in VBR. The lower 20 bits of the VBR are
not implemented by ColdFire processors. They are assumed to be zero, forcing the table to be aligned on
a 1 MByte boundary.
3.2.9
Status Register (SR)
The SR stores the processor status and includes the CCR, the interrupt priority mask, and other control
bits. In supervisor mode, software can access the entire SR. In user mode, only the lower 8 bits (CCR) are
accessible. The control bits indicate the following states for the processor: trace mode (T bit), supervisor
or user mode (S bit), and master or interrupt state (M bit). All defined bits in the SR have read/write access
when in supervisor mode. The lower byte of the SR (the CCR) must be loaded explicitly after reset and
before any compare (CMP), Bcc, or Scc instructions execute.
BDM: 0x801 (VBR)
Access: Supervisor read/write
BDM read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R
Base Address
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset 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 0 0 0 0
Figure 3-7. Vector Base Register (VBR)
BDM: 0x80E (SR)
Access: Supervisor read/write
BDM read/write
System Byte
Condition Code Register (CCR)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
T
0
S
M
0
I
P
0
0
X
N
Z
V
C
W
Reset
0
0
1
0
0
1
1
1
0
0
0
—
—
—
—
—
Figure 3-8. Status Register (SR)
Table 3-3. SR Field Descriptions
Field
Description
15
T
Trace enable. When set, the processor performs a trace exception after every instruction.
14
Reserved, must be cleared.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...