ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 82

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

On-chip peripherals
Note:
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The MCU is in reset state when the internal reset signal is high, when it is low the MCU is
External clock
The external clock (where available) is selected if CC0 = 1 and CC1 = 1 in the CR2 register.
The status of the EXEDG bit in the CR2 register determines the type of level transition on
the external clock pin EXTCLK that triggers the free running counter.
The counter is synchronized with the falling edge of the internal CPU clock.
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 34. Counter timing diagram, internal clock divided by 2
Figure 35. Counter timing diagram, internal clock divided by 4
Figure 36. Counter timing diagram, internal clock divided by 8
running.
Timer overflow flag (TOF)
Timer overflow flag (TOF)
Timer overflow flag (TOF)
Counter register
Internal reset
Counter register
Counter register
Timer clock
CPU clock
Internal reset
Internal reset
Timer clock
Timer clock
CPU clock
CPU clock
FFFC
FFFC
FFFD
FFFD
FFFE
FFFF
FFFD
0000
0001
0000
0002
0003
0001
ST7232Axx-Auto
0000