參數(shù)資料
型號： S1C6P466D0A0A00
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, UUC140
封裝： DIE-140
文件頁數(shù)： 105/174頁
文件大?。?/td> 1582K
代理商： S1C6P466D0A0A00
26
EPSON
S1C6P466 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
The interrupt selection register (SIK) and input comparison register (KCP) are individually set for the
input ports K00–K03 and K10–K13, and can specify the terminals for generating interrupt and interrupt
timing.
The interrupt selection registers (SIK00–SIK03, SIK10–SIK13) select what input of K00–K03 and K10–K13
to use for the interrupt. Writing "1" into an interrupt selection register incorporates that input port into
the interrupt generation conditions. The changing the input port where the interrupt selection register
has been set to "0" does not affect the generation of the interrupt.
The input interrupt timing can select that the interrupt be generated at the rising edge of the input or that
it be generated at the falling edge according to the set value of the input comparison registers (KCP00–
KCP03, KCP10–KCP13).
By setting these two conditions, the interrupt for K00–K03 or K10–K13 is generated when input ports in
which an interrupt has been enabled by the input selection registers and the contents of the input com-
parison registers have been changed from matching to no matching.
The interrupt mask registers (EIK0, EIK1) enable the interrupt mask to be selected for K00–K03 and K10–
K13.
When the interrupt is generated, the interrupt factor flag (IK0, IK1) is set to "1".
Figure 4.4.2.2 shows an example of an interrupt for K00–K03.
Interrupt selection register
SIK03
1
SIK02
1
SIK01
1
SIK00
0
Input port
(1)
(Initial value)
Interrupt generation
K03
1
K02
0
K01
1
K00
0
Input comparison register
KCP03
1
KCP02
0
KCP01
1
KCP00
0
With the above setting, the interrupt of K00–K03 is generated under the following condition:
(2)
K03
1
K02
0
K01
1
K00
1
(3)
K03
0
K02
0
K01
1
K00
1
(4)
K03
0
K02
1
K01
1
K00
1
Because K00 interrupt is set to disable, interrupt will be
generated when no matching occurs between the
contents of the 3 bits K01–K03 and the 3 bits input
comparison register KCP01–KCP03.
Fig. 4.4.2.2 Example of interrupt of K00–K03
K00 interrupt is disabled by the interrupt selection register (SIK00), so that an interrupt does not occur at
(2). At (3), K03 changes to "0"; the data of the terminals that are interrupt enabled no longer match the
data of the input comparison registers, so that interrupt occurs. As already explained, the condition for
the interrupt to occur is the change in the port data and contents of the input comparison registers from
matching to no matching. Hence, in (4), when the no matching status changes to another no matching
status, an interrupt does not occur. Further, terminals that have been masked for interrupt do not affect
the conditions for interrupt generation.
4.4.3 Mask option
In the S1C6P466, the input port specification is fixed at "Input with pull-up resistor".
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