psf2115 ETC-unknow, psf2115 Datasheet - Page 256

• Manufacturer Part Number: psf2115
• Description: Isdn Adapter Circuit Ipac
• Manufacturer: ETC-unknow

4.3.22
Value after reset: 00x00000
SPCR
SPU ... Software Power UP. (Used in TE-mode only)
Setting this bit to 1 will pull the DU-line to low. This will enforce connected layer 1 devices
to deliver IOM-clocking.
After power down in TE-mode the SPU-bit has to be set to “1” and then cleared again.
After a subsequent CIC-interrupt (C/I-code change; ISTAD) and reception of the C/I-
code “PU” (Power Up indication in TE-mode) the reaction of the processor would be:
• to write an Activate Request or TIM command as C/I-code in the CIX0-register.
• to reset the SPU bit and wait for the following CIC-interrupt.
SDL ... Switch Data Line
The switching of receive and transmit data of the D-channel controller to the IOM-2
interface is programmable by the SDL bit.
0: Transmit data is forwarded to the DU line, receive data comes from the DD line.
1: Transmit data is forwarded to the DD line, receive data comes from the DU line.
SPM ... Serial Port Timing Mode
Depending on the interface mode, the following timing options for the D-channel
controller are provided.
0: Terminal Mode
1: Non Terminal Mode
Note: The reset value for SPM is determined by pin MODE0 strapped to VDD or VSS
TLP ... Test Loop
When set to 1 the DU and DD-lines are internally connected together, and the times T1
and T2 are reduced (see TIMR1 register). Data coming from the layer 1 controller will not
be forwarded to the layer 2 controller (see chapter 2.5.9.2).
Semiconductor Group
(see chapter 2.4.1), however after reset the host can reconfigure the serial port
timing mode for the D-channel controller.
SPCR - Serial Port Control Register (Read/Write)
7
SPU
SDL
SPM
B
All three channels of the IOM-2 interface are used
(Typical applications: TE mode, LT-S in intelligent NT).
The selected IOM-2 channel (ADF1:CSEL2-0) is used
(Typical applications: LT-T, LT-S modes, 8 channel
structure on IOM-2)
TLP
256
C1C1 C1C0 C2C1 C2C0
Detailed Register Description
0
PSB 2115
PSF 2115
11.97
(B0)