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TC9328AF Datasheet(PDF) 7 Page - Toshiba Semiconductor |
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TC9328AF Datasheet(HTML) 7 Page - Toshiba Semiconductor |
7 / 84 page TC9328AF 2004-09-13 7 Pin No. Symbol Pin Name Function and Operation Remarks 42 HOLD Hold mode control input Input pin for request/release hold mode. Normally, this pin is used to input radio mode selection signals or battery detection signals. Hold mode includes CLOCK STOP mode (stops crystal oscillation) and WAIT mode (halts CPU). Setting is implemented with the CKSTP instruction or the WAIT instruction. To request Clock Stop mode, either L-level detection on the HOLD pin or forced execution can be programmed. The mode is released by H-level detection on the HOLD pin or input change, respectively. Executing the CKSTP instruction stops the clock generator and the CPU, entering memory backup state. In memory backup state, current dissipation becomes low (1 µA or less) and the display output/CMOS output ports automatically become L level and N-ch open drain output Off. Regardless of this input state, Wait mode is executed in order to lower power dissipation. Either crystal oscillator only in operation or CPU suspension can be programmed. For crystal oscillator only in operation, all displays are at L level and other pins are in hold state. For CPU suspension, the CPU stops and all others retain their states. Wait mode is released by changing HOLD input. 43 44 INTR1 INTR2 /PCTRin External interrupt input /Pulse counter input External interrupt input pins. When interrupts are enabled and a 13.3 to 26.7 ms pulse or longer is input to the pin, interrupt INTR1/2 is generated and the program jumps to address 1/2. Input logic or rising/falling edge can be selected for each input interrupt. The internal 8-bit timer clock input can be selected as input to the pins. When the count value reaches the specified value, an interrupt is generated (address 3). The pin is also used for input of an 8-bit pulse counter. Input rising/falling or upcount/downcount can be selected for the counter. These inputs use built-in Schmitt circuits. The pins can also be used as input ports for input of remote control signals or a tape count. VDD |
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Descripción similar - TC9328AF_04 |
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