Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 105)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 105 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Address Direct addressing Indirect addressing
0xFF
Special Function
Registers (SFRs)
RAM
0x80
0x7F
Byte-addressable area
0x30
0x2F
Bit-addressable area
0x20
0x1F
Register banks R0…R7
0x00
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 652X are shown in bold print (see 71M652X 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
Address
X000 X001 X010 X011 X100 X101 X110 X111
Bin/Hex
Address
Bit-
address-
able
Byte-addressable
F8 INTBITS FF
F0 B F7
E8 WDI EF
E0 A E7
D8 WDCON DF
D0 PSW D7
C8 T2CON 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