st72324bk STMicroelectronics, st72324bk Datasheet - Page 70

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

On-chip peripherals
Note:
70/167
A minimum of four falling edges of the CPU clock must occur between two consecutive
active edges of the external clock; thus the external clock frequency must be less than a
quarter of the CPU clock frequency.
Figure 32. Counter timing diagram, internal clock divided by 2
Figure 33. Counter timing diagram, internal clock divided by 4
Figure 34. Counter timing diagram, internal clock divided by 8
The MCU is in reset state when the internal reset signal is high, when it is low the MCU is
running.
Timer overflow flag (TOF)
Timer overflow flag (TOF)
Timer overflow flag (TOF)
Counter register
Internal reset
Timer clock
CPU clock
Counter register
Counter register
Internal reset
CPU clock
Internal reset
Timer clock
Timer clock
CPU clock
FFFC
FFFC
FFFD FFFE FFFF 0000 0001 0002 0003
FFFD
FFFD
0000
0001
0000
ST72323 ST72323L