Question
STPM3x power on initialization in UART mode
Posted on May 09, 2018 at 01:29
There is some contradiction about STPM32/33/34 POR initialization:
'After POR, to ensure a correct initialization, it is necessary to perform a reset of DSP and
communication peripherals through three SYN pulses (see Section 8.6.1 on page 67) and a single SCS pulse, as shown in the figure below. SCS pulse can be performed before or after SYN pulses, but minimum startup time before reset (as indicated in Table 5 on page 17) has to be respected.'DocID026142 Rev 7 (37/120)
'To ensure a correct initialization of DSP, it is recommended to perform a global reset
through three SYN pulses at startup and before setting configuration bits.'DocID026142 Rev 7 (68/120
)
But at the same time evaluation board STPM32V2 can work in UART mode and no SYN/SCS pulsed at all in this case.
Qestions:
- What is the sequence to insure the correct initialization in pure UART mode (RXD/TXD only) and is there any limitations in this case?
- Is there any hardware issues that can affect the correct initialization?
#stpm34 #stpmx #stpm32-reset #stpm3x #stpm32 #stpm33