SAA5290A Philips Semiconductors, SAA5290A Datasheet - Page 14

• Manufacturer Part Number: SAA5290A
• Description: Economy teletext and TV microcontrollers
• Manufacturer: Philips Semiconductors

7.4
The 80C51 communicates with the peripheral functions using Special Function Registers (SFRs) which are addressed as RAM locations. The registers
in the teletext decoder appear as normal SFRs in the microcontroller memory map, but are written to using an internal serial bus. The SFR map is given
in Table 10.
7.4.1
Table 10 Special Function Register map; note 1
SYMBOL
ACC
B
DPTR
IE
P0
P1
P2
P3
PCON
(2)
DPH
DPL
(2)(3)
(2)
(2)
(2)
(2)(3)
(2)
Microcontroller interfacing
(3)
S
PECIAL
Accumulator
B register
Data Pointer
(2 bytes)
Interrupt
Enable
Port 0
Port 1
Port 2
Port 3
Power Control
High byte
Low byte
NAME
F
UNCTION
R
DIRECT
EGISTER MAP
ADDR.
(HEX)
E0
A8
A0
B0
F0
83
82
80
90
87
E7
AF
EA
A7
B7
F7
87
97
7
ARD
ES1
E6
AE
A6
B6
BIT ADDRESS, SYMBOL OR ALTERNATIVE PORT FUNCTION
F6
86
96
6
ES2
E5
AD
A5
B5
F5
85
95
5
AC
E4
F4
84
94
A4
B4
4
*
*
GF1
ET1
AB
E3
F3
83
93
A3
B3
3
GF0
EX1
E2
AA
A2
B2
F2
82
92
2
ET0
E1
F1
A9
A1
B1
81
91
1
EX0
E0
F0
A8
80
90
A0
B0
0
RESET
VALUE
(HEX)
00
00
00
00
00
FF
FF
FF
FF
10