iC-GF
TRANSCEIVER
Rev C1, Page 17/26
CHANNEL 1
TXEN(0) QCFG1(1:0) TX OUTD(0) INV(0) QN1 QP1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
01
01
01
01
10
10
10
10
11
11
11
11
01
01
01
01
10
10
10
10
11
11
11
11
x
x
x
x
x
x
x
x
x
0
0
1
1
0
0
1
1
0
0
1
1
x
x
x
x
x
x
x
x
x
x
x
x
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
off
on
on
off
off
off
off
off
on
off
off
on
off
on
on
off
off
off
off
off
on
off
off
on
off
off
off
off
off
on
on
off
off
on
on
off
off
off
off
off
off
on
on
off
off
on
on
off
x
x
x
L
L
H
H
L
L
H
H
L
L
H
H
Table 11: Function table for channel 1 in SPI mode
FCFI(1:0)
Adr 0x02; Bit (1:0)
R/W 01
ister FCFG for pins TX and OEN and register FCFI for
pin CFI. Figure 9 shows the filter time ttrig for TX (cf.
Electrical Characteristics Nos. 613 to 616 and 816 to
819).
00
01
10
11
Filter disabled
4 µs filtering (8 CLKs)
7 µs filtering (14 CLKs)
16 µs filtering (32 CLKs)
Excitation current
Table 12: CFI filter configuration
Using register NEXC an additional current Iexc can
be activated for driving capacitive loads. Figure 9
shows the characteristic of one channel with the ex-
citation current enabled (cf. Electrical Characteristics
Nos. 110, 111, 210 and 211).
FCFG(1:0)
Adr 0x02; Bit (3:2)
Filter disabled
R/W 10
00
01
TX: 1.5 µs filtering (3 CLKs)
OEN: 3 µs filtering (6 CLKs)
10
11
TX: 4 µs filtering (8 CLKs)
OEN: 8 µs filtering (16 CLKs)
NEXC(1:0)
Adr 0x03; Bit (1:0)
R/W 11
x0
x1
0x
1x
Excitation for channel 1 enabled
Excitation for channel 1 disabled
Excitation for channel 2 enabled
Excitation for channel 2 disabled
TX: 7.5 µs filtering (15 CLKs)
OEN: 15 µs filtering (30 CLKs)
Table 13: TX and OEN filter configuration
Table 14: Excitation current configuration
Digital filtering at inputs
The digital input filters can be configured with the reg-
ICHAUS [ IC-HAUS GMBH ]
