ST92F124/F150/F250 - INTERRUPTS
5.12 WAKE-UP / INTERRUPT LINES MANAGEMENT UNIT (WUIMU)
5.12.1 Introduction
5.12.2 Main Features
■ Supports up to 16 additional external wake-up
The Wake-up/Interrupt Management Unit extends
the number of external interrupt lines from 8 to 23
(depending on the number of external interrupt
lines mapped on external pins of the device).
or interrupt lines
■ Wake-Up lines can be used to wake-up the ST9
from STOP mode.
The 16 additional external Wake-up/interrupt pins
can be programmed as external interrupt lines or
as wake-up lines, able to exit the microcontroller
from low power mode (STOP mode) (see Figure
55).
■ Programmable selection of wake-up or interrupt
■ Programmable wake-up trigger edge polarity
■ All Wake-Up Lines maskable
Note: The number of available pins is device de-
pendent. Refer to the device pinout description.
Figure 55. Wake-Up Lines / Interrupt Management Unit Block Diagram
WKUP[7:0]
WKUP[15:8]
NMI
WUTRH
WUTRL
TRIGGERING LEVEL REGISTERS
PENDING REQUEST REGISTERS
MASK REGISTERS
WUPRH
WUMRH
WUPRL
WUMRL
Not Connected
1)
SW SETTING
1
0
WUCTRL
TO CPU
INTD1 - External Interrupt Channel
TO CPU
TO RCCU - Stop Mode Control
Note 1: The reset signal on the Stop bit is stronger than the set signal.
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STMICROELECTRONICS [ ST ]
