SAB80C517A-N18 Siemens Semiconductor Group, SAB80C517A-N18 Datasheet - Page 25

• Manufacturer Part Number: SAB80C517A-N18
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: Siemens Semiconductor Group

Table 1:
Behaviour of P0/P2 and
@DPTR
MOVX
MOVX
@Ri
DPTR < XRAM
DPTR
XPAGE < XRAM
XPAGE
modes compatible to 8051 - family
address
range
address
range
addr. page
range
addr. page
range
XRAM
XRAM
RD WR
a) P0/P2
b)
c) ext. memory is
a) P0/P2
(
b)
c) XRAM is used
a) P0
P2
b)
c) ext. memory is
a) P0/P2
(
P2
b)
c) XRAM is used
WR
WR
/
RD WR
used
RD WR
Ý
RD WR
Ý
RD WR
used
-Data only)
-Data only)
I/0
I/0
Ý
/
/
/
/
during MOVX accesses
Bus
00
Ý
Ý
Ý
Bus
BUS
BUS
active
inactive
active
inactive
a) P0/P2
b)
c) ext. memory is
a) P0/P2
(
b)
c) XRAM is used
a) P0
P2
b)
c) ext. memory is
a) P0/P2
(
P2
b)
c) XRAM is used
XMAP1, XMAP0
WR
WR
RD WR
used
used
RD WR
Ý
RD WR
Ý
RD WR
-Data only)
-Data only)
I/0
I/0
Ý
/
/
/
/
EA
Bus
10
Ý
Ý
Ý
= 0
active
Bus
BUS
active
active
BUS
active
a) P0/P2
b)
c) ext. memory is
a) P0/P2
b)
c) ext. memory is
a) P0
P2
b)
c) ext. memory is
a) P0
P2
b)
c) ext. memory is
used
used
used
used
RD WR
RD WR
Ý
RD WR
Ý
RD WR
Ý
I/0
Ý
I/0
/
/
/
/
Bus
Bus
X1
Ý
Ý
Bus
active
Bus
active
active
active
a) P0/P2
b)
c) ext. memory is
a) P0/P2
b)
c) XRAM is used
a) P0
P2
b)
c) ext. memory is
a) P0/P2
b)
c) XRAM is used
used
used
RD WR
RD WR
Ý
RD WR
RD WR
I/0
Ý
/
/
/
/
Bus
00
Ý
Ý
Ý
Bus
I/0
I/0
active
inactive
active
inactive
a) P0/P2
b)
c) ext. memory is
a) P0/P2
(
b)
c) XRAM is used
a) P0
P2
b)
c) ext. memory is
a) P0
(
P2
b)
c) XRAM is used
WR
WR
XMAP1, XMAP0
used
used
RD WR
RD WR
Ý
RD WR
Ý
RD WR
-Data only)
-Data only)
I/0
I/0
Ý
Ý
/
/
/
/
EA
Bus
BUS
10
Ý
Ý
Bus
BUS
active
active
active
active
= 1
a) P0/P2
b)
c) ext. memory is
a) P0/P2
b)
c) ext. memory is
a) P0
P2
b)
c) ext. memory is
a) P0
P2
b)
c) ext. memory is
used
used
used
used
RD WR
RD WR
Ý
RD WR
Ý
RD WR
I/0
I/0
Ý
Ý
/
/
/
/
Bus
Bus
X1
Ý
Ý
Bus
active
Bus
active
active
active