ML66525 Family User’s Manual
Chapter 22
Special Function Registers (SFRs)
22 - 3
Bit
Sy
mbol
A
ddress
[H]
Functi
on
By
te
Wor
d
7
6
5
4
3
2
1
0
R/W
8/16
In
itial
v
a
lue
[H]
Reference
page
0000
—
FF
0001
Sy
stem
stack
pointer
—
SSP
16
FF
2-22
0002
LRBL
Undefined
0003
Local
register
base
LRBH
LRB
8/16
Undefined
2-21
0004
PSW
L
MAB
F1
BCB1
BCB0
F0
SCB2
SCB1
SCB0
00
0005
Program
status
w
o
rd
PSW
H
PSW
CY
ZF
HC
DD
S
F2
OV
MI
E
8/16
00
2-17
0006
ACCL
00
0007
Accum
u
lator
ACCH
ACC
8/16
00
2-16
0008
Table
segment
register
TSR
0
00
2-25
0009
Data
segment
register
DSR
DSTSR
0
8/16
00
2-26
000A
EX
PANDED
RAM
ready
control
register
X
P
DRDY
(1)
X
RDY2
X
RDY1
S
RDY0
8
FF
4-7
000B
ROM
w
indow
register
ROMW
IN
(*1)
1
8
Undefined
4-2
000C
ROM
ready
control
register
ROMRDY
(1)
0
(1)
0
ORDY
1
O
RDY
0
8
8B
4-4
000D
RAM
ready
control
register
RAMRDY
(*2)
(1)
ARDY12
ARDY11
ARDY10
(1)
ADRY02
ARDY01
ARDY00
R/
W
8
FF
4-5
000E
Stop
code
acceptor
STPACP
—
W
8
“0”
3-3
000F
Stadby
control
register
SBY
CON
—
CLK1
CLK0
OST1
OST0
OSCS
FLT
HLT
STP
R/W
8
08
3-4
0010
Memory
size
acceptor
MEMSACP
—
W
8
“0”
2-2
0011
Memory
size
control
register
MEMSCON
—
(1
)(1)
(1)
LROM
LRAM
8
FC
2-1
0013
Real-time
counter
control
regist
er
RTCCON
—
(1)
SELRTI1
SELRTI0
RTCIE
RTCCL
8
F0
9-2
0015
Peripheral
control
register
PRPHCON
—
(1)
0
EX
TX
T
(1)
0
8
8C
13-2
0018
Port
0
data
register
P0
—
P0_7
P0_6
P0_5
P0_4
P0_3
P0_2
P0_1
P0_0
8
00
5-16
0019
Port
1
data
register
P1
—
P1_7
P1_6
P1_5
P1_4
P1_3
P1_2
P1_1
P1_0
8
00
5-18
001A
Port
2
data
register
P2
—
(0)
P2_3
P2_2
P2_1
P2_0
8
00
5-20
001B
Port
3
data
register
P3
—
(0)
P3_3
P3_2
P3_1
P3_0
8
00
5-22
001C
Port
4
data
register
P4
—
P4_7
P4_6
P4_5
P4_4
P4_3
P4_2
P4_1
P4_0
8
00
5-24
001E
Port
6
data
register
P6
—
(0)
P6_3
P6_2
P6_1
P6_0
8
00
5-26
001F
Port
7
data
register
P7
—
P7_7
P7_6
(0)
8
00
5-28
0020
Port
0
mode
register
P0IO
—
P0IO7
P0IO6
P0IO5
P0IO4
P0IO3
P0IO2
P0IO1
P0IO0
8
00/FF
5-16
0021
Port
1
mode
register
P1IO
—
P0IO7
P0IO6
P0IO5
P0IO4
P0IO3
P0IO2
P0IO1
P0IO0
8
00/FF
5-18
0022
Port
2
mode
register
P2IO
—
(0)
P2IO3
P2IO2
P2IO1
P2IO0
8
00/0F
5-20
0023
Port
3
mode
register
P3IO
—
(0)
P3IO3
P3IO2
P3IO1
(0)
8
00/02
5-22
0024
Port
4
mode
register
P4IO
—
P4IO7
P4IO6
P4IO5
P4IO4
P4IO3
P4IO2
P4IO1
P4IO0
8
00/FF
5-24
0025
Internal
control
register
P5IO
(*3)
FSEL1
FSEL0
SCK4IO
SC
K4IN
V
STBSEL
MECKEN
U
D
C
KEN
U
SBR
ST
8
00
13-3
0026
Port
6
mode
register
P6IO
—
(0)
P6IO3
P6IO2
P6IO1
P6IO0
R/
W
8
00
5-26
Table 22-1
SFR List (1/5)