SAB80C515A-M18-T3 Siemens Semiconductor Group, SAB80C515A-M18-T3 Datasheet - Page 20

• Manufacturer Part Number: SAB80C515A-M18-T3
• 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
page
XPAGE
page
modes compatible to 8051 - family
XRAM
XRAM
address
range
address
range
addr.
range
addr.
range
RD
a) P0/P2
b) RD
c) ext. memory is
a) P0/P2
(
b) RD
c) XRAM is used
a) P0
P2
b) RD
c) ext. memory is
a) P0/P2
(
P2
b) RD
c) XRAM is used
/
WR
WR
WR
used
used
-Data only)
-Data only)
during MOVX accesses
I/0
I/0
/
/
/
/
WR active
WR inactive
WR active
WR inactive
Bus
00
Bus
BUS
BUS
a) P0/P2
b) RD
c) ext. memory is
a) P0/P2
(
b) RD
c) XRAM is used
a) P0
P2
b) RD
c) ext. memory is
a) P0/P2
(
P2
b) RD
c) XRAM is used
XMAP1, XMAP0
WR
WR
used
used
-Data only)
-Data only)
I/0
I/0
EA
/
/
/
/
WR active
WR active
WR active
WR active
Bus
10
= 0
Bus
BUS
BUS
a) P0/P2
c) ext. memory is
a) P0/P2
c) ext. memory is
a) P0
c) ext. memory is
a) P0
c) ext. memory is
b) RD
b) RD
P2
b) RD
P2
b) RD
used
used
used
used
I/0
I/0
/
/
/
/
WR active
WR active
WR active
WR active
X1
Bus
Bus
Bus
Bus
a) P0/P2
b) RD
c) ext. memory is
a) P0/P2
b) RD
c) XRAM is used
a) P0
P2
b) RD
c) ext. memory is
a) P0/P2
b) RD
c) XRAM is used
used
used
I/0
/
/
/
/
WR active
WR inactive
WR active
WR inactive
Bus
00
Bus
I/0
I/0
a) P0/P2
b) RD
c) ext. memory is
a) P0/P2
(
b) RD
c) XRAM is used
a) P0
P2
b) RD
c) ext. memory is
a) P0
(
P2
b) RD
c) XRAM is used
XMAP1, XMAP0
WR
WR
used
used
-Data only)
-Data only)
I/0
I/0
/
/
/
/
EA
WR active
WR active
WR active
WR active
Bus
BUS
10
= 1
Bus
BUS
a) P0/P2
b) RD
c) ext. memory is
a) P0/P2
b) RD
c) ext. memory is
a) P0
P2
b) RD
c) ext. memory is
a) P0
P2
b) RD
c) ext. memory is
used
used
used
used
I/0
I/0
/
/
/
/
WR active
WR active
WR active
WR active
Bus
Bus
X1
Bus
Bus