ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 141

• Manufacturer Part Number: ST72344S4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72344S4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST72344xx ST72345xx
11.5.5
●
●
Therefore, a valid Data bit must have samples 8, 9 and 10 at the same value to prevent the
Noise Flag getting set.
Figure 66. Bit sampling in reception mode
Low-power modes
Table 57.
Wait
Halt
RDI LINE
Sample
clock
–
Therefore, a valid Start bit must satisfy both the above conditions to prevent the Noise
Flag getting set.
Data bits: the noise flag (NF) is set during normal data bit reception if the following
condition occurs:
–
Mode
after the falling edge occurs, during the sampling of the 16 samples, if one of the
samples numbered 3, 5 or 7 is detected as a “1”.
During sampling of the 16 samples, if one of the samples numbered 8, 9 or 10 is
detected as a “1”.
During the sampling of 16 samples, if all three samples numbered 8, 9 and 10 are
not the same. The majority of the 8th, 9th and 10th samples is considered as the
bit value.
Mode description
1
No effect on SCI.
SCI interrupts cause the device to exit from Wait mode.
SCI registers are frozen.
In Halt mode, the SCI stops transmitting/receiving until Halt mode is exited.
2
3
4
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Doc ID 12321 Rev 5
5
6
One bit time
7
sampled values
8
Description
9
10
11
12
13
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On-chip peripherals
14
15
16
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