SAB-C509-LM SIEMENS [Siemens Semiconductor Group], SAB-C509-LM Datasheet - Page 25

• Manufacturer Part Number: SAB-C509-LM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

MOVX
@DPTR
MOVX
@ Ri
Table 3
Behaviour of P0/P2 and RD/WR During MOVX Accesses
modes compatible to 8051/C501 family
DPTR
<
XRAM
address
range
DPTR
XRAM
address
range
XPAGE
<
XRAM
addr.page
range
XPAGE
XRAM
addr.page
range
00
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
(WR / RD Data)
b)RD/WR
inactive
c)XRAM is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P0
(WR / RD Data)
P2
b)RD/WR
inactive
c)XRAM is used
I/O
I/O
Bus
Bus
Bus
Bus
XMAP1, XMAP0
10
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
(WR / RD Data)
b)RD/WR active
c)XRAM is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P0
(WR / RD Data)
P2
b)RD/WR active
c)XRAM is used
EA = 0
I/O
I/O
Bus
Bus
Bus
Bus
X1
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
b)RD/WR active
c) ext.memory
is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
I/O
I/O
Bus
Bus
Bus
Bus
00
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
b)RD/WR
inactive
c)XRAM is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P2
P0/P2
b)RD/WR
inactive
c)XRAM is used
I/O
Bus
I/O
I/O
Bus
I/0
XMAP1, XMAP0
10
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
(WR / RD Data)
b)RD/WR active
c)XRAM is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P0
(WR / RD Data)
P2
b)RD/WR active
c)XRAM is used
EA = 1
I/O
I/O
Bus
Bus
Bus
Bus
X1
a)P0/P2
b)RD/WR active
c)ext.memory
is used
a)P0/P2
b)RD/WR active
c) ext.memory
is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
a)P0
P2
b)RD/WR active
c)ext.memory
is used
I/O
I/O
Bus
Bus
Bus
Bus