psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 172

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

Data Sheet
Figure 81
Undervoltage Control Timing
6.3
At the active low RST input pin an external reset can be applied forcing the device into
the reset state. This external reset signal is additionally fed to the RSTO/SDS2 output.
The length of the reset signal is specified in chapter 8.1.8.
After a reset of the undervoltage detection or an external reset (RST) all internal registers
are set to their reset values (see register description in chapter 7).
6.4
Every internal functional block can be reset separately by setting the corresponding bit
in the SRES register (see chapter 7.1.13). The reset state is activated as long as the bit
is set to ’1’. The address range of the registers which will be reset at each SRES bit is
listed in figure 80.
External Reset Input
Software Reset Register (SRES)
162
PSB 21391
PSB 21393
2001-03-07
Reset