DS80CH11 Datasheet, PDF (54/88 Pages) Dallas Semiconductor – System Energy Manager

DS80CH11
When an AMQ bit is set to 1, the corresponding activity
monitor input pin is qualified with IOR or IOW. As a
result, the corresponding AMF bit will not be set unless
the programmed state on the AMI.n pin is accompanied
with a valid IOR or IOW signal. This prevents false trig-
gering of activity monitor inputs from chip select outputs
due to address decoding glitches.
8.5 AMP – ACTIVITY MONITOR POLARITY REGISTER
AMP; SFR ADDR.=094H
BIT 7
BIT 6
AMP7
AMP6
BIT 5
AMP5
BIT 4
AMP4
BIT 3
AMP3
BIT 2
AMP2
BIT 1
AMP1
BIT 0
AMP0
Read/Write Access: Unrestricted.
Initialization: 00h on any type of reset
The bits in the AMP register are used to select the polar-
ity of a valid state on the activity monitor input pins.
When an AMP bit is set to 1, a high state is selected as
valid on the corresponding AMI pin. When and AMP bit
= 0, a low state is selected as valid.
8.6 AMF – ACTIVITY MONITOR FLAG REGISTER
AMF; SFR ADDR.=095H
BIT 7
BIT 6
AMF7
AMF6
BIT 5
AMF5
BIT 4
AMF4
BIT 3
AMF3
BIT 2
AMF2
BIT 1
AMF1
BIT 0
AMF0
Read/Write Access: Unrestricted.
Initialization: 00h on any type of reset
An AMF bit will be set whenever a valid state is detected
on the associated AMI.n pin. A valid state is determined
by the programming of the Activity Monitor Polarity reg-
ister and the Activity Monitor Qualifier register, both
described above. If the associated AME bit is set, the
AMF bit is enabled as an interrupt source. An SEM inter-
8.7 LED CONTROL
Part 7 can also be used to control LED’s by turning them
on or off. To turn on an LED, the Port 7.X bit must be pro-
grammed to a logic 0 allowing current to sink into the
DS80CH11. To turn off an LED the Port 7.X but must be
programmed to a logic 1, preventing any current flow
rupt will be recognized if the EAM is also set, enabling
activity monitor interrupts. Upon receiving an activity
monitor interrupt, the system should read the AMF reg-
ister to determine the source of interrupt. An AMF bit
can be cleared by writing it to a 0 to clear the interrupt
source condition. Writing a 1 has no effect.
through the LED circuit. Each Port 7 pin is capable of
sinking 10mA of current. When using this port for LED
control it is recommended that no more than 40mA of
sink current be dissipated at a time into the DS80CH11.
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