STV2050A STMicroelectronics, STV2050A Datasheet - Page 63

• Manufacturer Part Number: STV2050A
• Description: IC DGTL CONVERGENCE PROC 80-PQFP
• Manufacturer: STMicroelectronics
• Type: Videor

Specifications of STV2050A

• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 80-MQFP, 80-PQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

To initiate access to an EEPROM, the MCU must generate this code. A simple method is to
store the values in a single temporary byte TMP[7:0] and to compute each bit of the Hamming
HAM[3:0] bits as follows:
HAM[0] = TMP[4] XOR TMP[3] XOR TMP[2] XOR TMP[1] XOR TMP[0]
HAM[1] = TMP[6] XOR TMP[5] XOR TMP[4] XOR TMP[2] XOR TMP[0]
HAM[2] = TMP[7] XOR TMP[5] XOR TMP[2] XOR TMP[1]
HAM[3] = TMP[7] XOR TMP[6] XOR TMP[4] XOR TMP[3]
14.3 SECURITY OUTPUT
The POUT output can be considered as an open drain from a functional point of view, that is
to say that it can have two electrical states: high impedance or pull-down to the ground.
It can be used, for example, to force all external amplifiers to a secured biasing. Refer to
Figure "" on page
The electrical status of this output is controlled by the PPL bit in the E3 register.
During normal operation it is pulled down to ground:
– if the STV2050A detects a malfunction such as a parity check error or power on reset error.
– until the power-on reset is released.
Otherwise, POUT is set to high impedance. In this case, the logical status of the POUT pin can
be read using the S02 bit in the E3 register.
15 BOOT SEQUENCE
At startup, or following a reset on pin 13, the STV2050A will:
– Immediately disable all the outputs (forced to the “zero current” value, in order to protect the
application against over-currents in the coils for example),
PPL
8.
0: Normal operation
1: High impedance
EEPROMadd [2:0] ADS[1:0]
7
MSB
6
5
TMP BYTE
4
3
2
RWM [2:0]
STV2050A - BOOT SEQUENCE
1
LSB
0
63/83