ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 49

• 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

ST7232Axx-Auto
7.6
7.7
7.7.1
External interrupts
Interrupt related instructions
Table 12.
1. During the execution of an interrupt routine, the HALT, POP CC, RIM, SIM and WFI instructions change
I/O port interrupt sensitivity
The external interrupt sensitivity is controlled by the IPA, IPB and ISxx bits of the EICR
register
sensitivities.
Each external interrupt source can be generated on four (or five) different events on the pin:
●
●
●
●
●
To guarantee correct functionality, the sensitivity bits in the EICR register can be modified
only when the I1 and I0 bits of the CC register are both set to 1 (level 3). This means that
interrupts must be disabled before changing sensitivity.
The pending interrupts are cleared by writing a different value in the ISx[1:0], IPA or IPB bits
of the EICR.
HALT
IRET
JRM
JRNM
POP CC
RIM
SIM
TRAP
WFI
Instruction
the current software priority up to the next IRET instruction or one of the previously mentioned instructions.
Falling edge
Rising edge
Falling and rising edge
Falling edge and low level
Rising edge and high level (only for ei0 and ei2)
(Figure
Dedicated interrupt instruction set
Entering halt mode
Interrupt routine return
Jump if I1:0 = 11 (level 3)
Pop CC from the stack
Enable interrupt (level 0 set) Load 10 in I1:0 of CC
Disable interrupt (level 3 set) Load 11 in I1:0 of CC
Wait for interrupt
Jump if I1:0 <> 11
Software TRAP
18). This control allows up to 4 fully independent external interrupt source
New description
Pop CC, A, X, PC
I1:0 = 11 ?
I1:0 <> 11 ?
Mem => CC
Software NMI
Function/example
(1)
I1
I1
I1
1
1
1
1
1
H
H
H
I0
I0
I0
0
0
1
1
0
N
N
N
Interrupts
Z
Z
Z
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C
C
C