參數(shù)資料
型號： S1C63408F0A0100
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, PQFP128
封裝： PLASTIC, QFP-128
文件頁數(shù)： 89/151頁
文件大?。?/td> 1171K
代理商： S1C63408F0A0100
34
EPSON
S1C63406/408 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
KCP00–KCP03: K0 port input comparison register (FF55H)
Interrupt conditions for terminals K00–K03 can be set with these registers.
When "1" is written: Falling edge
When "0" is written: Rising edge
Reading: Valid
The interrupt conditions can be set for the rising or falling edge of input for each of the four bits (K00–
K03), through the input comparison registers (KCP00–KCP03).
A comparison is done only with the ports that are enabled by the interrupt among K00–K03 by means of
the SIK00–SIK03 registers.
At initial reset, these registers are set to "1".
K0NR0, K0NR1: K0 interrupt noise rejector selection register (FF43HD0, D1)
Selects the noise-reject width.
Table 4.4.4.2 Setting up noise rejector
K0NR1
1
0
K0NR0
1
0
1
0
Noise-reject width
7.8 msec
2.0 msec
0.5 msec
OFF (bypassed)
(When fOSC1 = 32.768 kHz)
Be sure to turn the noise rejector OFF before executing the SLP instruction.
At initial reset, these registers are set to "0".
EIK00–EIK03: K0 input interrupt mask register (FFEBH)
Masks the input interrupt request to the CPU.
When "1" is written: Enable
When "0" is written: Mask
Reading: Valid
When "1" is written to the EIK0x register, the input interrupt request will be generated to the CPU. When
"0" is written, no input interrupt will be generated from the corresponding port.
The wake up signal to release the SLEEP mode will be generated even if this register is set to "0". How-
ever, enable the input port interrupt using the corresponding interrupt mask register before executing the
SLP instruction to run input interrupt handler routine after SLEEP status is released.
At initial reset, this register is set to "0".
IK00–IK03: K0 input interrupt factor flag (FFFBH)
This flag indicates the occurrence of input interrupt.
When "1" is read: Interrupt has occurred
When "0" is read: Interrupt has not occurred
When "1" is written: Flag is reset
When "0" is written: Invalid
IK0x is the interrupt factor flag corresponding to the K0x port. From the status of this flag, the software
can decide whether an input interrupt has occurred.
The interrupt factor flag is set to "1" when the interrupt condition is established regardless of the interrupt
mask register setting. However, the interrupt does not occur to the CPU when the interrupt is masked.
This flag is reset to "0" by writing "1".
After an interrupt occurs, the same interrupt will occur again if the interrupt enabled state (I flag = "1") is
set or the RETI instruction is executed unless the interrupt factor flag is reset. Therefore, be sure to reset
(write "1" to) the interrupt factor flag in the interrupt service routine before shifting to the interrupt
enabled state.
At initial reset, this flag is set to "0".
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