Register Reset Conditions
The functionality of the remaining bits is the same on C28x as they are on
C2xLP. It should be noted that although the functionality did not change, the
bit position in the registers did. These bits are:
- Sign extension mode (SXM)
- Overflow mode (OVM)
- Test/control flag (TC)
- Carry bit (C)
- Interrupt global mask bit (INTM)
C.2.4 Register Reset Conditions
The reset conditions of internal registers have changed between the C2xLP
and C28x as shown in Table C−4. Most C28x registers are cleared on a reset.
Differences in Table C−5 are highlighted in bold.
Table C−4. Reset Conditions of Internal Registers
C2xLP Register C2xLP Reset C28x Register C28x Reset
T X XT 0x00000000
P X P 0x00000000
ACC X ACC 0x00000000
AR0−AR7 X XAR0−XAR7 0x00000000
PC 0x0000 PC 0x3FFFC0
ST0 See Table C−5 ST0 0x0000
ST1 See Table C−5 ST1 0x080B
DP X DP 0x0000
− − SP 0x0400
IMR 0x00 IER 0x0000
− − DBGIER 0x0000
IFR 0x0000 IFR 0x0000
GREG 0x0000 − −
− − RPC 0x000000
X = Uninitiated
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