C517A_99 Datasheet, PDF (36/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

MOVX
@DPTR
DPTR
<
XRAM
address
range
DPTR
≥
XRAM
address
range
MOVX
@ Ri
XPAGE
<
XRAM
addr.page
range
XPAGE
≥
XRAM
addr.page
range
EA = 0
EA = 1
XMAP1, XMAP0
XMAP1, XMAP0
00
10
X1
00
10
X1
a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→Bus
b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active
c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is
used
used
used
used
used
used
a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→Bus a)P0/P2→I/O a)P0/P2→Bus a)P0/P2→Bus
(RD/WR-Data) (RD/WR-Data)
(RD/WR-Data)
b)RD/WR
b)RD/WR active b)RD/WR active b)RD/WR
b)RD/WR active b)RD/WR active
inactive
inactive
c)XRAM is used c)XRAM is used c) ext.memory c)XRAM is used c)XRAM is used c) ext.memory
is used
is used
a)P0→Bus
a)P0→Bus
a)P0→Bus
a)P0→Bus
a)P0→Bus
a)P0→Bus
P2→I/O
P2→I/O
P2→I/O
P2→I/O
P2→I/O
P2→I/O
b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active b)RD/WR active
c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is c)ext.memory is
used
used
used
used
used
used
a)P0→Bus
(RD/WR-Data)
P2→I/O
a)P0→Bus
(RD/WR-Data)
P2→I/O
a)P0→Bus
P2→I/O
a)P0/P2→I/O
a)P0→Bus
(RD/WR-Data)
P2→I/O
a)P0→Bus
P2→I/O
b)RD/WR
b)RD/WR active b)RD/WR active b)RD/WR
b)RD/WR active b)RD/WR active
inactive
inactive
c)XRAM is used c)XRAM is used c)ext.memory is c)XRAM is used c)XRAM is used c)ext.memory is
used
used
modes compatible to 8051/C501 family
Table 3-7
Behaviour of P0/P2 and RD/WR During MOVX Accesses