ST72345C4 STMicroelectronics, ST72345C4 Datasheet - Page 91

• 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

ST72344xx ST72345xx
Caution:
Table 42.
A modification of the time base is taken into account at the end of the current period
(previously set) to avoid an unwanted time shift. This allows to use this time base as a real-
time clock.
Bit 1 = OIE Oscillator interrupt enable
Bit 0 = OIF Oscillator interrupt flag
The BRES and BSET instructions must not be used on the MCCSR register to avoid
unintentionally clearing the OIF bit.
MCC beep control register (MCCBCR)
Reset value: 0000 0000 (00h)
Bits 7:2 = Reserved, must be kept cleared.
Bits 1:0 = BC[1:0] Beep control
prescaler
This bit set and cleared by software.
0: Oscillator interrupt disabled
1: Oscillator interrupt enabled
This interrupt can be used to exit from Active-halt mode.
When this bit is set, calling the ST7 software HALT instruction enters the Active-halt
power-saving mode
This bit is set by hardware and cleared by software reading the MCCSR register. It
indicates when set that the main oscillator has reached the selected elapsed time
(TB1:0).
0: Timeout not reached
1: Timeout reached
These 2 bits select the PF1 pin beep capability.
Counter
7
0
200000
16000
32000
80000
Time base control
0
.
f
OSC2
0
20 ms
50 ms
4 ms
8 ms
Doc ID 12321 Rev 5
= 4 MHz
0
Read/Write
Time base
0
f
OSC2
10 ms
25 ms
2 ms
4 ms
= 8 MHz
0
On-chip peripherals
BC1
TB1
0
0
1
1
BC0
0
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TB0
0
1
0
1