R1610C RDC Semiconductor, R1610C Datasheet - Page 23

• Manufacturer Part Number: R1610C
• Description: High Performance 16 Bits MCU Integrated One 10/100M Mac Controller - 3.3V Operating Voltage/2.5V Core Voltage
• Manufacturer: RDC Semiconductor

R
Memory is organized in sets of segments. Each segment contains a 16-bit value. Memory is addressed with a
two-component address that consists of a 16-bit segment and 16-bit offset. The Physical Address Generation figure
describes how the logical address is transferred to the physical address.
Data Sheet
Final Version 1.5
October 27, 2003
R
6.4 Address Generation
8
7
6
5
4
3
2
1
0
D
D
The Execution Unit generates a 20-bit physical address to Bus Interface Unit by the Address Generation.
Rsvd
Rsvd
Rsvd
C
C
CF
TF
SF
ZF
AF
PF
®
®
Trace Flag. Set to enable single-step mode for debugging; Clear to disable the single-step mode.
If an application program sets the TF flag with POPF or IRET instruction, a debug exception is
generated after the instruction (The CPU automatically generates an interrupt after each
instruction) that follows the POPF or IRET instruction.
Sign Flag. If this flag is set, the high-order bit of the result of an operation will be 1
state of being negative.
Zero Flag. If this flag is set, the result of operation will be zero.
Reserved
Auxiliary Flag. If this flag is set, there will be a carry from the low nibble to the high one or a
borrow from the high nibble to the low nibble of the AL general-purpose register. It is used in
BCD operation.
Reserved
This flag will be set if the result of the low-order 8 bits operation has even parity.
Reserved
Carry Flag. If CF is set, there will be a carry out or a borrow into the high-order bit of the
instruction result.
R
R
I
I
S
S
C
C
D
D
19
19
S
S
P
P
1
1
C
C
o
o
m
m
15
TO Memory
m
m
2
0
2
u
u
n
n
i
i
c
c
a
a
t
t
i
i
o
o
F
F
0
n
n
Shift left 4 bits
A
9
1
0
2
2
0
0
0
Physical Address Generation
Physical Address
15
15
1
0
2
0
F
1
9
2
0
0
Segment Base
Offset
Fast Ethernet RISC Processor
Address
Logical
R1610C
,
indicating the
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