tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 114

• Manufacturer Part Number: tmp88cs38ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.10.3
2.10.4
Noise Elimination Time Setting
signals shorter than the fixed time can be eliminated as noise.
Operation
(1) Interrupts at rising, falling, or rising/falling edge, and measurement modes
The remote control receive circuit has a noise canceler. By setting RNC in RXCR1, input
RNC
000
001
010
011
100
101
110
111
the internal clock. After measurement, the 8-bit up counter value is saved in RXCTR.
Then, the 8-bit up counter is cleared, an INT3 request is generated, and the 8-bit up
counter resumes counting.
request is generated and the overflow flag (OVFF) is set to “1”. Then, the 8-bit up
counter is cleared. An overflow can be detected by reading OVFF by the interrupt
processing. To restart the 8-bit up counter, set RCS to “1”.
First set EINT and RMM. Next, set RCS to “1”; the 8-bit up counter is counted up by
If the 8-bit up counter overflows (FFH) before measurement is completed, an INT3
Setting RCS to “1” zero clears OVFF.
Table 2.10.2 Noise Elimination Time Setting (fc = 16 MHz)
(2
(2
(2
(2
(2
(2
(2
10
11
13
14
5
8
9
Minimum Signal Pulse Width
+ 5)/fc
+ 5)/fc
+ 5)/fc
+ 5)/fc
+ 5)/fc
+ 5)/fc
+ 5)/fc
−
(128.3
(512.3
(16.31 μs)
(32.31 μs)
(64.31 μs)
88CS38-114
(2.31 μs)
(1.024 ms)
μs)
μs)
Maximum Noise Width to be Eliminated
(2
(2
(2
(2
(2
(2
(2
10
11
2
5
6
7
8
× 7 − 1)/fc
× 7 − 1)/fc
× 7 − 1)/fc
× 7 − 1)/fc
× 7 − 1)/fc
× 7 − 1)/fc
× 7 − 1)/fc
TMP88CS38/CM38A/CP38A
−
(111.9 μs)
(447.9 μs)
(895.9 μs)
(13.88 μs)
(27.88 μs)
(55.88 μs)
(1.69 μs)
2007-09-12