Features
1.1
Pin Definitions and Functions (cont'd)
Pin No. Pin No. Symbol Input (I)
Pin No.
Function
P-DIP-40 P-MQFP-64 P-LCC-44
Output (O)
Open
Drain (OD)
9
6
56
52
10
7
EAW
I
External Awake (terminal
specific function). If a falling
edge on this input is detected,
the ISAC-S TE generates an
interrupt and, if enabled, a
reset pulse.
SDS1
O
Serial Data Strobe 1.
A programmable strobe signal,
selecting either one or two B-
or IC-channels on IOM-2
interface, is supplied via this
line. After reset, SDS1 takes
on its function only after a write
access to SPCR is made.
19
7
22
BCL
O
Bit Clock: Clock of frequency
768 kHz, IOM-2 mode.
10, 14, 18 57, 6, 61
11, 15, 21
–
–
–
I
Digital ground
VSSD
VSSA
21
28
23
10
24
31
26
Analog ground
13, 21
12
Power supply (5 V ± 5 %)
VDD
XTAL1
Connection for crystal or
external clock input
Connection for external
crystal.
22
11
25
XTAL2
O
Left unconnected if external
clock is used.
24
25
14
16
27
28
SR2
SR1
I
I
S-Bus Receiver Input
S-Bus Receiver Input
29
22
32
SX1
O
S-Bus Transmitter Output
(positive)
30
23
33
SX2
O
S-Bus Transmitter Output
(negative)
31
32
24
25
34
35
IDP0(DD) I/O
IDP1(DU) I/O
IOM-Data Port 0 (DD)
IOM-Data Port 1 (DU)
Open drain without internal
pull-up resistor or push-pull
(ADF2:ODS)
Semiconductor Group
13
SIEMENS [ Siemens Semiconductor Group ]
