ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 56

• 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

Power saving modes
8.4
56/201
Active halt and halt modes
Figure 21. Wait mode flow-chart
1. Before servicing an interrupt, the CC register is pushed on the stack. The I[1:0] bits of the CC register are
Active halt and halt modes are the two lowest power consumption modes of the MCU. They
are both entered by executing the ‘HALT’ instruction. The decision to enter either in active
halt or halt mode is given by the MCC/RTC interrupt enable flag (OIE bit in MCCSR
register).
Table 16.
set to the current software priority level of the interrupt routine and recovered when the CC register is
popped.
MCCSR
OIE bit
0
1
Active halt and halt power saving modes
Halt mode
Active halt mode
Power saving mode entered when HALT instruction is executed
N
WFI instruction
Interrupt
Y
Oscillator
Peripherals
CPU
I[1:0] bits
Oscillator
Peripherals
CPU
I[1:0] bits
Oscillator
Peripherals
CPU
I[1:0] bits
N
256 OR 4096 CPU clock
Fetch reset vector or
service interrupt
cycle delay
Reset
Y
XX
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
10
10
(1)
ST7232Axx-Auto