PEB20571 INFINEON [Infineon Technologies AG], PEB20571 Datasheet - Page 103

• Manufacturer Part Number: PEB20571
• Description: ICs for Communications
• Manufacturer: INFINEON [Infineon Technologies AG]

4.3.2.7
The IOM-2 ports can be configured to Push-Pull or Open-Drain modes by a dedicated
bit in the IOMU Control Register. When programmed to Open-Drain, DD0/DD1 is tri-
stated when a ‘1’ is supposed to be transmitted, or during a time slot quadruplet with the
associated Tri-State Register bit set.
In both cases the external pull-up resistor, which is used when working in open-drain
mode, will “pull” the value to ‘1’.
Note: When the IOMU is programmed to 1x 64 time slots per frame mode, DD1 is tri-
Figure 4-5
Figure 4-6
Preliminary Data Sheet
stated, independently of the IOM-2 interface push-pull or open-drain mode.
IOM-2 Push-Pull and Open-Drain Modes
IOM-2 Interface Open-Drain Mode
IOM-2 Interface Push-Pull Mode
DD0
DD1
DD0
DD1
DELIC
DELIC
4-19
downstream1
data
downstream1
data
downstream0
data
downstream0
data
IOMU
IOMU
Functional Description
ITSR
ITSR
PEB 20571
DELIC
2003-08