Register Description
CSEL2-0 Channel Select.
Used in non-terminal mode (SPCR:SPM = 1).
Select one IOM channel out of 8, where the ISAC-S is to receive/transmit.
000 channel 0 (first channel in IOM frame)
001 channel 1
...
111 channel 7 (last channel in IOM frame)
Inter-Frame Time Fill
ITF
Selects the inter-frame time fill signal which is transmitted between HDLC frames.
0: idle (continuous 1 s),
1: flags (sequence of patterns: "0111 1110")
Note:
In TE and LT-T applications with D-channel access handling (collision resolution),
the only possible inter-frame time fill signal is idle (continuous 1 s). Otherwise the D
channel on the S/T bus cannot be accessed.
4.3.16 Additional Feature Register 2
ADF2
Read/Write Address 39
H
Value after reset: 00
7
H
0
IMS
D2C2 D2C1 D2C0 ODS D1C2 D1C1 D1C0
IMS
IOM Mode Selection
IOM-2 interface mode is selected when IMS = 1.
D2C2-0 Data Strobe Control. Used in IOM-2 mode only.
D1C2-0 These bits determine the polarity of the two independent strobe signals SDS1 and
SDS2 as follows:
DxC2
DxC1
DxC0
SDSx
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
always low
high during B1
high during B2
high during B1 + B2
always low
high during IC1
high during IC2
high during IC1 + IC2
Note: x = 1 for pin SDS1 or 2 for pin SDS2
The strobe signals allow standard combos or data devices to access
a programmable channel.
Semiconductor Group
239
INFINEON [ Infineon ]
