PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 201

• Manufacturer Part Number: PEB20534H-10
• Description: DMA Supported Serial Communication Controller with 4 Channels DSCC4
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

the DSCC4. It immediately drives all PCI outputs to their benign state, pin REQ is driven
to tristate . The TxDn output signals are driven to high impedance, the RTSn output
signals are driven to inactive. All bi-directional signals (e.g. Multi Function Port (MFP))
are switched to input function.
All registers and functions are initialized to known states (RESET values).
After RST is deasserted, the functional blocks PCI, SCCs, LBI, SSC and GPP are in
reset state or standby mode.
Table 26
Block
PCI interface
Global Registers
DMAC
SCC
LBI
SSC
GPP
9
9.1
The DSCC4 offers several reset functions. An external low signal on signal RST resets
Semiconductor Group
Reset and Initialization Procedure
Reset and Power-On
Status after Hardware Reset
Reset Status
Standby
PCI Config Space registers accessible.
Standby
Slave registers accessible;
Host Bus Interface enabled in PCI mode!
Standby
Slave registers accessible.
Standby
Slave registers accessible
Reset Status:
– power-down mode
– HDLC mode
– NRZ coding
– …
Refer to reset values in “SCC Registers - Detailed
Register Description” on page 272.
Reset
Slave register LCONF has reset value.
Standby
Slave registers accessible.
Standby
Slave registers accessible.
201
Reset and Initialization Procedure
Data Sheet 09.98
PEB 20534