mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 96

no-image

mc68hc708mp16

Manufacturer Part Number
mc68hc708mp16
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
mc68hc708mp16CFU
Manufacturer:
FRE/MOT
Quantity:
20 000
System Integration Module (SIM)
7.6.2 Reset
7.6.3 Status Flag Protection in Break Mode
7.7 Low-Power Mode
Technical Data
96
All reset sources always have equal and highest priority and cannot be
arbitrated.
The SIM controls whether status flags contained in other modules can
be cleared during break mode. The user can select whether flags are
protected from being cleared by properly initializing the break clear flag
enable bit (BCFE) in the SIM break flag control register (SBFCR).
Protecting flags in break mode ensures that set flags will not be cleared
while in break mode. This protection allows registers to be freely read
and written during break mode without losing status flag information.
Setting the BCFE bit enables the clearing mechanisms. Once cleared in
break mode, a flag remains cleared even when break mode is exited.
Status flags with a two-step clearing mechanism — for example, a read
of one register followed by the read or write of another — are protected,
even when the first step is accomplished prior to entering break mode.
Upon leaving break mode, execution of the second step will clear the flag
as normal.
Executing the WAIT instruction puts the MCU in a low-power-
consumption mode for standby situations. The SIM holds the CPU in a
non-clocked state. The operation of this mode is described below. WAIT
clears the interrupt mask (I) in the condition code register, allowing
interrupts to occur.
System Integration Module (SIM)
MC68HC708MP16
Freescale Semiconductor
Rev. 3.1

Related parts for mc68hc708mp16