Special function registers location – Maxim Integrated 71M6513H Power Meter IC Family Software User Manual
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71M651x Software User’s Guide
address
direct addressing
Indirect addressing
0xFF
0x80
Special Function
Registers (SFRs)
0x7F
0x30
RAM
0x2F
0x20
bit-addressable area
0x1F
0x00
register banks R0…R7
Table 6-3: Internal Data Memory Map
Special Function Registers Location
A map of the Special Function Registers is shown in Table 6-4. Only a few addresses are occupied, the others are not
implemented. SFRs specific to the 651X are shown in bold print (see 71M651X data sheet for descriptions of these
registers). Any read access to unimplemented addresses will return undefined data, while any write access will have
no effect. The registers at 0x80, 0x88, 0x90, etc., are bit-addressable, all others are byte-addressable.
Hex/Bin
X000
X001
X010
X011
X100
X101
X110
X111
Bit-
address-
able
Byte-addressable
Bin/Hex
F8
INTBITS
FF
F0
B
F7
E8
WDI
EF
E0
A
E7
D8
WDCON
DF
D0
PSW
D7
C8
CF
C0
IRCON
C7
B8
IEN
IP1
S0RELH
S1RELH
USR2
BF
B0
FLSHCTL
PGADR
B7
A8
IEN0
IP0
S0RELL
AF
A0
DIO11
(P2)
DIO12
(P2)
DIO8
(P0)
A7
98
S0CON
S0BUF
IEN2
S1CON
S1BUF
S1RELL
EEDATA
EECTRL
9F
90
DIO9
(P1)
DIO10
(P1)
DPS
ERASE
97
88
TCON
TMOD
TL0
TL1
TH0
TH1
CKCON
8F
80
DIO7
(P0)
SP
DPL
DPH
DPL1
DPH1
WDTREL
PCON
87
Table 6-4: Special Function Registers Locations
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