SDA5252 SIEMENS [Siemens Semiconductor Group], SDA5252 Datasheet - Page 33

• Manufacturer Part Number: SDA5252
• Description: TVTEXT 8-Bit Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

6.2.10
To fit the requirements of various applications the input circuit of the sandcastle decoder
is programmable. Both slicing levels (V
decoder function can be varied in a range of about 0.9 V and in addition there is the
possibility to increase the implemented hysteresis by 0.3 V typically. Further noise
reduction and spike rejection on pin SC is accomplished by using a digital filter following
the input circuitry. See Figure 41 on page 133 for further information on V
Sandcastle Control Register SCCON
Sandcastle Control Register
Default after reset: 00
SCCL1...0
SCL.2
SCCH1...0
SCCH.2
Attention
Semiconductor Group
(MSB)
0
Sandcastle Decoder
SCCH.2
H
SCCH.1
00 = set V
01 = increase V
10 = increase V
11 = increase V
0 = hysteresis V
1 = increase hysteresis V
00 = set V
01 = increase V
10 = increase V
11 = increase V
0 = hysteresis V
1 = increase hysteresis V
Bits 3 and 7 have to be set to ‘0’.
SCCH.0
SCL2
SCH
to lowest level 3.0 V (typ.)
SCCON
to lowest level (1.0 V typ.)
SCH
SCL2
SCL2
SCL2
SCH
SCH
SCH
SCL2
SCH
33
, V
by 0.3 V (typ.)
by 0.6 V (typ.)
by 0.9 V (typ.)
set to 0.3 V (typ.)
by 0.3 V (typ.)
by 0.6 V (typ.)
by 0.9 V (typ.)
set to 0.3 V (typ.)
SCL2
0
) which are important for proper SC-
SCL2
SCH
by 0.6 V
by 0.6 V (typ.)
SCCL.2
SCCL.1
SFR-Address CE
SCH
SDA 525x
1998-04-08
and V
SCCL.0
(LSB)
SCL2
H
.