PSB21383HV1.3XT Infineon Technologies, PSB21383HV1.3XT Datasheet - Page 182
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PSB21383HV1.3XT
Manufacturer Part Number
PSB21383HV1.3XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSB21383HV1.3XT.pdf
(270 pages)
Specifications of PSB21383HV1.3XT
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / Rohs Status
Compliant
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Data Sheet
6.1
The internal reset sources C/I code change, EAW and Watchdog can be output at the
low active reset pin RSTO/SDS2. The selection of these reset sources can be done with
the RSS2,1 bits in the MODE1 register according table 26.
If RSS2,1 = ’01’ the RSTO/SDS2 pin has SDS2 functionality and a serial data strobe
signal (see chapter 2.2.3) is output at the RSTO/SDS2 pin. In this case only a hardware
reset is output at RSTO/SDS2. The internal reset sources set the MODE1 register to its
default value.
Table 26
Reset Source Selection
• C/I Code Change (Exchange Awake) A change in the downstream C/I channel (C/
• EAW (Subscriber Awake)
• Watchdog Timer
1.
2.
RSS2
Bit 1
I0) generates a reset pulse of 125µs
A low pulse of at least 65 ns pulse width on the EAW input starts the oscillator from
the power down state and generates a reset pulse of 125 µs
After the selection of the watchdog timer (RSS = ’11’) an internal timer is reset and
started. During every time period of 128 ms the microcontroller has to program the
WTC1- and WTC2 bits in the following sequence to reset and restart the watchdog
timer:
If not, the timer expires and a WOV-interrupt (ISTA Register) together with a reset
pulse of 125 µs is generated.
If the watchdog timer is enabled (RSS = ’11’) the RSS bits can only be changed by a
hardware reset.
0
0
1
1
WTC1
1
0
RSS1
Reset Source Selection
Bit 0
0
1
0
1
C/I Code
Change
--
--
--
x
WTC2
0
1
EAW
t
172
--
--
--
x
250µs.
Watchdog
Timer
--
--
--
x
t
250 µs.
Functionality
PSB 21381/2
PSB 21383/4
SDS2
2001-03-12
--
--
--
x
Reset
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