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MC68302FC20 Datasheet(PDF) 32 Page - Motorola, Inc

Part No. MC68302FC20
Description  Integrated Multiprotocol Processor User’s Manual
Download  480 Pages
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC68302FC20 Datasheet(HTML) 32 Page - Motorola, Inc

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MC68000/MC68008 Core
2-2
MC68302 USER’S MANUAL
MOTOROLA
Figure 2-1. M68000 Programming Model
The supervisor's programming model includes supplementary registers, including the su-
pervisor stack pointer (SSP) and the status register (SR) as shown in Figure 2-2. The SR
contains the interrupt mask (eight levels available) as well as the following condition codes:
overflow (V), zero (Z), negative (N), carry (C), and extend (X). Additional status bits indicate
that the processor is in trace (T) mode and/or in a supervisor (S) state.
A1
A0
A2
A3
A4
A5
A6
A7
(USP)
D0
D1
D2
D3
D4
D5
D6
D7
CCR
PC
USER STACK
POINTER
PROGRAM
COUNTER
CONDITION
CODE
REGISTER
A7'
(SSP)
SR
SUPERVISOR
STACK
POINTER
STATUS
REGISTER
DATA
REGISTERS
ADDRESS
REGISTERS
USER
MODE
SUPERVISOR
MODE
31
0
CCR
0
15
15
0
31
0
0
0
7
31
31
87
16 15
31
0
16 15
8 7


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