SDA5250 Datasheet, PDF (12/143 Pages) Siemens Semiconductor Group – TVTEXT 8-Bit Microcontroller

SDA 525x
5
Pin Functions (ROM- and ROMless-Version)
Table 1
Pin Functions (ROM- and ROMless-Version)
Symbol Pin No.
P-SDIP-
52-1
P0.0 9
P0.1 8
P0.2 7
P0.3 6
P0.4 5
P0.5 4
P0.6 3
P0.7 2
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)
34
56
48
33
57
49
31
58
50
30
59
51
29
60
52
28
61
53
27
62
54
26
63
55
I/O
Port 0 is an 8-bit open drain
I/O
bidirectional I/O port. Port 0 pins
I/O
that have 1s written to them float; in
I/O
this state they can be used as high-
I/O
impedance inputs (e.g. for software
I/O
driven I²C Bus).
I/O
I/O
P1.0 23
53
11
84
P1.1 22
52
10
83
P1.2 21
51
9
82
P1.3 20
50
8
81
P1.4 19
48
7
80
P1.5 18
47
6
79
P1.6 17
46
5
78
P1.7 16
44
4
77
I/O
Port 1 is an 8-bit bidirectional
I/O
multifunctional I/O port with internal
I/O
pullup resistors. Port 1 pins that
I/O
have 1s written to them are pulled
I/O
high by the internal pullup resistors
I/O
and in that state can be used as
I/O
inputs.
I/O
The secondary functions of port 1
pins are:
Port bits P1.0 - P1.5 contain the
6 output channels of the 8-bit pulse
width modulation unit.
Port bits P1.6 - P1.7 contain the two
output channels of the 14-bit pulse
width modulation unit.
P2.0 34
1
67
61
I
P2.1 33
63
66
60
I
P2.2 32
62
65
59
I
P2.3 31
61
64
58
I
P2.0 - P2.3 are working as digital or
analog inputs.
XTAL2 13
40
14
3
O
Output of the inverting oscillator
amplifier.
To drive the device from an external
clock source, XTAL1 should be
driven, while XTAL2 is left open.
XTAL1 12
39
15
4
I
Input to the inverting oscillator
amplifier
RST 15
42
16
5
I
A low level on this pin resets the
processor
Semiconductor Group
12
1998-04-08