psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 169

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

6
The SCOUT can be reset completely by a hardware reset (pin RST) or by the integrated
undervoltage detection circuit. Additionally each functional block can be reset separately
via register SRES.
If enabled an exchange awake, subscriber awake, watchdog timeout or undervoltage
detection can generate a reset on pin RSTO/SDS2. A hardware reset always generates
a reset on pin RSTO/SDS2 (see figure 80).
Figure 80
Reset Generation. The above mentioned reset pulse widths are controlled by the
clock pin FSC
Data Sheet
Reset MODE1 Register
Internal Reset of all Registers
C/I Code Change
(Exchange Awake)
EAW
(Subscriber Awake)
Watchdog
Undervoltage Detection/
Power On Reset
Software Reset
(Register SRES)
Block
HDLC:
TR:
IOM:
MON:
CO:
CPLL:
Reset Functional Block
Reset
Register
(00
(30
(40
(5C
(60
H
H
H
H
H
-2F
-3B
-5B
-6F
-
-5F
H
H
H
H
H
)
)
)
)
)
125 µs < t < 250 µs
125 µs < t < 250 µs
t = 125 µs
t = 64 ms
'0'
SDSx_CR Register
SDSx SDS2
159
'1'
Res_Gen_p.vsd
RST Pin
SDS1 Pin
PSB 21391
PSB 21393
2001-03-07
RSTO/
SDS2 Pin
Reset