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TMP86PM74AFG bảng dữ liệu(PDF) 29 Page - Toshiba Semiconductor |
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TMP86PM74AFG bảng dữ liệu(HTML) 29 Page - Toshiba Semiconductor |
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29 / 190 page  Page 19 TMP86PM74AFG Figure 2-7 Level-sensitive Release Mode Note 1: Even if the STOP pin input is low after warm-up start, the STOP mode is not restarted. Note 2: In this case of changing to the level-sensitive mode from the edge-sensitive mode, the release mode is not switched until a rising edge of the STOP pin input is detected. (2) Edge-sensitive release mode (RELM = “0”) In this mode, STOP mode is released by a rising edge of the STOP pin input. This is used in appli- cations where a relatively short program is executed repeatedly at periodic intervals. This periodic signal (for example, a clock from a low-power consumption oscillator) is input to the STOP pin. In the edge-sensitive release mode, STOP mode is started even when the STOP pin input is high level. Do not use any STOP5 to STOP2 pin input for releasing STOP mode in edge-sensitive release mode. Figure 2-8 Edge-sensitive Release Mode Example 2 :Starting STOP mode from NORMAL mode with an INT5 interrupt. PINT5: TEST (P2PRD). 0 ; To reject noise, STOP mode does not start if JRS F, SINT5 port P20 is at high LD (SYSCR1), 01010000B ; Sets up the level-sensitive release mode. DI ; IMF ← 0 SET (SYSCR1). 7 ; Starts STOP mode SINT5: RETI Example :Starting STOP mode from NORMAL mode DI ; IMF ← 0 LD (SYSCR1), 10010000B ; Starts after specified to the edge-sensitive release mode VIH NORMAL operation Warm up STOP operation Confirm by program that the STOP pin input is low and start STOP mode. Always released if the STOP pin input is high. STOP pin XOUT pin STOP mode is released by the hardware. NORMAL operation NORMAL operation NORMAL operation VIH STOP mode is released by the hardware at the rising edge of STOP pin input. Warm up STOP mode started by the program. STOP operation STOP operation STOP pin XOUT pin |
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