ST72345C4 STMicroelectronics, ST72345C4 Datasheet - Page 232

• Manufacturer Part Number: ST72345C4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72345C4

• 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

Device configuration and ordering information
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Device configuration and ordering information
Each device is available for production in user programmable versions (Flash).
ST72F34x Flash devices are shipped to customers with a default content (FFh). This implies
that Flash devices have to be configured by the customer using the Option Bytes.
Option bytes
The four option bytes allow the hardware configuration of the microcontroller to be selected.
The option bytes can be accessed only in programming mode (for example using a standard
ST7 programming tool).
Option byte 0
OPT7 = WDG Halt Watchdog Reset on Halt
OPT6 = WDG SW Hardware or Software Watchdog
OPT5:4 = LVD[1:0] Low voltage detection selection
Table 119. LVD threshold configuration
OPT3:2 = SEC[1:0] Sector 0 size definition
Table 120. Size of sector 0
LVD Off
Highest voltage threshold (∼4.1V)
Medium voltage threshold (∼3.5V)
Lowest voltage threshold (∼2.8V)
This option bit determines if a reset is generated when entering Halt mode while the
Watchdog is active.
0: No Reset generation when entering Halt mode
1: Reset generation when entering Halt mode
This option bit selects the watchdog type.
0: Hardware (watchdog always enabled)
1: Software (watchdog to be enabled by software)
These option bits enable the LVD block with a selected threshold as shown in
Table
These option bits indicate the size of sector 0 according to the following table.
Sector 0 size
119.
0.5k
1k
Configuration
Doc ID 12321 Rev 5
SEC1
0
0
ST72344xx ST72345xx
SEC0
LVD1
0
1
1
1
0
0
LVD0
1
0
1
0