Table 2-1, Lists th – Motorola ColdFire MCF5281 User Manual
Page 49
ColdFire Core
Freescale Semiconductor
2-3
Accumulators and extension bytes can be loaded, copied, and stored, and results from EMAC
arithmetic operations generally affect the entire 48-bit destination.
— One 16-bit mask register (MASK)
— One 32-bit Status register (MACSR) including four indicator bits signaling product or
accumulation overflow (one for each accumulator: PAV0–PAV3)
The supervisor programming model is to be used only by system control software to implement restricted
operating system functions, I/O control, and memory management. All accesses that affect the control
features of ColdFire processors are in the supervisor programming model, which consists of registers
available in user mode as well as the following control registers:
•
16-bit status register (SR)
•
32-bit supervisor stack pointer (SSP)
•
32-bit vector base register (VBR)
•
32-bit cache control register (CACR)
•
32-bit access control registers (ACR0, ACR1)
Table 2-1. ColdFire Core Programming Model
BDM
Register
Width
(bits)
Access
Reset Value
Written with
MOVEC
Section/Page
Supervisor/User Access Registers
Load: 0x080
Store: 0x180
Data Register 0 (D0)
32
R/W
0xCF20_6080
No
Load: 0x081
Store: 0x181
Data Register 1 (D1)
32
R/W
0x13B0_1080
No
Load: 0x082–7
Store: 0x182–7
Data Register 2–7 (D2–D7)
32
R/W
Undefined
No
Load: 0x088–8E
Store: 0x188–8E
Address Register 0–6 (A0–A6)
32
R/W
Undefined
No
Load: 0x08F
Store: 0x18F
Supervisor/User A7 Stack Pointer (A7)
32
R/W
Undefined
No
0x804
MAC Status Register (MACSR)
32
R/W
0x0000_0000
No
0x805
MAC Address Mask Register (MASK)
32
R/W
0xFFFF_FFFF
No
0x806, 0x809,
0x80A, 0x80B
MAC Accumulators 0–3 (ACC0–3)
32
R/W
Undefined
No
0x807
MAC Accumulator 0,1 Extension Bytes
(ACCext01)
32
R/W
Undefined
No
0x808
MAC Accumulator 2,3 Extension Bytes
(ACCext23)
32
R/W
Undefined
No
0x80E
Condition Code Register (CCR)
8
R/W
Undefined
No
•
Two 32-bit memory base address registers (RAMBAR, FLASHBAR)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3