User`s manual

Device Specification
Semiconductor Group 7-23
s
00 10 X1
DPTR < XRAM
address range
MOVX
@Ri
MOVX
@DPTR
a) P0/P2➝Bus b)
RD/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b)
RD/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b) RD
/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b) RD
/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b)
RD/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b)
RD/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b)
RD/WR active
c) ext. memory is used
a) P0/P2
➝Bus
b)
RD/WR active
c) ext. memory is used
modes compatible to 8051 - family
00 10 X1
XMAP1, XMAP0
EA = 0
a) P0/P2➝BUS (WR -Data only) b) RD/WR inactive
c) XRAM is used
a) P0/P2➝BUS (WR -Data only) b) RD/WR active
c) XRAM is used
a) P0/P2➝I/0 b)
RD/WR inactive
c) XRAM is used
a) P0/P2➝BUS (WR -Data only) b) RD/WR active
c) XRAM is used
a) P0/P2➝BUS (WR -Data only) P2➝I/0
b) RD/WR inactive c) XRAM is used
a) P0/P2➝BUS (WR -Data only) P2➝I/0
b) RD/WR active c) XRAM is used
a) P0
➝Bus
P2
➝I/0
b) RD/WR active
c) ext. memory is used
a) P0/P2➝I/0 b)
RD/WR inactive
c) XRAM is used
a) P0➝BUS (WR -Data only) P2➝I/0
b) RD/WR active c) XRAM is used
a) P0
➝Bus
P2
➝I/0
b) RD/WR active c) ext. memory is used
a) P0
➝Bus
P2➝I/0
b) RD/WR active c) ext. memory is used
a) P0
➝Bus
P2➝I/0
b)
RD/WR active
c) ext. memory is used
a) P0➝Bus
P2➝I/0 b) RD/WR active c) ext. memory is used
a) P0
➝Bus
P2➝I/0 b) RD/WR active c) ext. memory is used
a) P0
➝Bus
P2➝I/0
b) RD/WR active c) ext. memory is used
DPTR ≥ XRAM
address range
XPAGE < XRAM
addr.
page
range
XPAGE ≥ XRAM
addr.
page
range
XMAP1, XMAP0
EA = 1
a) P0➝Bus
P2➝I/0
b) RD/WR active c) ext. memory is used
Table 1: Behaviour of P0/P2 and RD/WR during MOVX accesses