ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 133

• 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
Figure 64. Word length programming
1. LBCL bit controls last data clock pulse.
Transmitter
The transmitter can send data words of either 8 or 9 bits depending on the M bit status.
When the M bit is set, word length is 9 bits and the 9th bit (the MSB) has to be stored in the
T8 bit in the SCICR1 register.
When the transmit enable bit (TE) is set, the data in the transmit shift register is output on
the TDO pin.
CLOCK
CLOCK
9-bit (M bit is set)
Start
Bit
8-bit (M bit is reset)
Start
Bit
Bit0
Bit0
Bit1
Bit1
Data Frame
Data Frame
Idle Frame
Break Frame
Break Frame
Idle Frame
Bit2
Bit2
Doc ID 12321 Rev 5
Bit3
Bit3
Bit4
Bit4
Bit5
Bit5
Bit6
Bit6
Possible
Bit7
Parity
Bit7
Bit
****
Possible
(1)
Parity
Bit8
Bit
(1)
Stop
Bit
Stop
Bit
Extra
Start
Next
Start
Bit
Bit
’1’
On-chip peripherals
Next
Start
Next Data Frame
Start
Extra
Bit
Bit
’1’
Start
Next Data Frame
Bit
Start
Bit
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