73S1209F Maxim, 73S1209F Datasheet - Page 18

• Manufacturer Part Number: 73S1209F
• Description: The 73S1209F is a self-contained, SoC smart card reader IC that is an ideal solution for serially connected ISO 7816 design
• Manufacturer: Maxim

1.5 Special Function Registers (SFRs)
The 73S1209F utilizes numerous SFRs to communicate with the 73S1209F s many peripherals. This
results in the need for more SFR locations outside the direct address IRAM space (0x80 to 0xFF). While
some peripherals are mapped to unused IRAM SFR locations, additional SFRs for the smart card and
other peripheral functions are mapped to the top of the XRAM data space (0xFC00 to 0xFFFF).
1.5.1
A map of the Special Function Registers is shown in Table 6.
Only a few addresses are used, the others are not implemented. SFRs specific to the 73S1209F are
shown in bold print (gray background). Any read access to unimplemented addresses will return
undefined data, while most write access will have no effect. However, a few locations are reserved and
not user configurable in the 73S1209F. Writes to the unused SFR locations can affect the operation
of the core and therefore must not be written to. This applies to all the SFR areas in both the
IRAM and XRAM spaces. In addition, all unused bit locations within valid SFR registers must be
left in their default (power on default) states.
18
Hex\
Bin
D8
D0
C8
C0
F8
F0
E8
E0
B8
B0
A8
A0
98
90
88
80
Internal Data Special Function Registers (SFRs)
BRCON
T2CON
S0CON
IRCON
USR70
TCON
USR8
X000
PSW
IEN1
IEN0
B
A
UDIR70
S0BUF
UDIR8
TMOD
KCOL
X001
IP1
IP0
SP
Table 6: IRAM Special Function Registers Locations
FLSHCTL
S0RELH
S0RELL
KROW
X010
IEN2
DPS
DPL
TL0
S1RELH
KSCAN
S1CON
X011
DPH
TL1
ERASE
KSTAT
S1BUF S1RELL
DPL1
X100
TH0
KSIZE
DPH1
X101
TH1
KORDERL KORDERH
WDTREL
X110
PGADDR
MCLKCtl
PCON
X111
Rev. 1.2
Bin/
Hex
DF
CF
FF
EF
E7
D7
C7
BF
B7
AF
A7
F7
9F
97
8F
87