Siemens M20 Terminal

Hardware interfaces
Version 8 dated 15.03.00 19
Siemens Information and Communication Products
A
4.3.3 Display
12 Pins for connection of a dot display (2 lines x 16 columns)
For detailed information on read and write timing see
Fig. 4-2 Write timing of display interface and Read timing of display in-
terface
. The corresponding timing values can be found in Timing values of display interface.
Fig. 4-2 Write timing of display interface
Fig. 4-3 Read timing of display interface
Signal Function I/O Level Comments
DCS# Chip select O 2.8V may be disconnected if unused
DRS Address (A0) O 2.8V may be disconnected if unused
DE Data enable O 2.8V may be disconnected if unused
D8...D15 Databus I/O 2.8V may be disconnected if unused
HWR# Write O 2.8V may be disconnected if unused
DCS#
HWR#
DRS
DE
t
10
t
11
t
13
t
14
t
15
t
16
D15:8
t
12
t
17
t
18
t
19
DCS#
HWR#
DRS
DE
t
20
t
11a
D15:8
t
12
t
23
t
21
t
22
DATA VALID