SDA5250 Datasheet, PDF (13/143 Pages) Siemens Semiconductor Group – TVTEXT 8-Bit Microcontroller

SDA 525x
Table 1
Pin Functions (ROM- and ROMless-Version) (cont’d)
Symbol Pin No.
P-SDIP-
52-1
V_DD
11, 37
V_SS
10, 35
Pin No. Pin No. Pin No. Input (I) Function
P-MQFP- P-MQFP- P-LCC-84- Output (O)
64-1
80-1
2
Supply (S)
5, 6,
13, 51 2, 43
S
37, 38
2, 3,
12, 50 1, 42
S
35, 36
Power supply voltage
Ground (0 V)
R
47
19
45
37
O
Red colour signal output
G
48
20
46
38
O
Green colour signal output
B
49
21
47
39
O
Blue colour signal output
BLAN 50
22
48
40
O
Blanking output
COR 51
23
49
41
O
Contrast Reduction output
P3.0 52
24
3
76
P3.1 1
25
2
75
P3.2 44
15
80
74
P3.3 36
4
79
73
P3.4 43
14
78
72
P3.5 42
13
77
71
P3.6 41
10
76
70
P3.7 40
9
75
69
I/O
Port 3 is an 8-bit bidirectional I/O
I/O
port with internal pullup resistors.
I/O
Port 3 pins that have 1s written to
I/O
them are pulled high by the internal
I/O
pullup resistors and in that state can
I/O
be used as inputs.
I/O
It also contains the interrupt, timer
I/O
and serial port input pins. The
output latch corresponding to a
secondary function must be
programmed to a one (1) for that
function to operate.
The secondary functions are
assigned to the pins of port 3 as
follows:
- INT0 (P3.2): interrupt 0
input/timer 0 gate control input
- INT1 (P3.3): interrupt 1
input/timer 1 gate control input
- T0 (P3.4): counter 0 input
- T1 (P3.5): counter 1 input
- RXD(P3.6): serial port receive
line
- TXT(P3.7): serial port transmit
line
Attention: P3.6 must not be kept to
‘0’ during reset, otherwise a special
test mode will be activated.
Semiconductor Group
13
1998-04-08