RELIANCE 45C271内存扩展模块
当设置为逻辑1（1）时，启用跟踪。该位必须设置为逻辑1，以允许外部寄存器更新。Ipsw-第6位中断开关-该位用于在日间时间报警和看门狗报警之间切换中断输出。当设置为逻辑零（0）时，中断输出来自看门狗报警。当设置为逻辑一（1）时，中断输出来自日时报警。Ibh/lo-保留位5-该位应设置为逻辑低（0）。Pu/lvl—第4位中断脉冲模式或电平模式—该位确定中断输出是作为脉冲还是电平输出。当设置为逻辑零（0）时，中断输出将为一个电平。当设置为逻辑1（1）时，中断输出将是一个脉冲。在脉冲模式下，中断输出将吸收电流至少3毫秒。该位应设置为逻辑1（1）。Wam-位3看门狗报警掩码-当Ipsw（位6，中断开关）设置为逻辑零（0）时，启用/禁用看门狗报警以中断输出。当设置为逻辑零（0）时，将启用看门狗报警中断输出。当设置为逻辑1（1）时，看门狗报警中断输出将被禁用。
When set to a logic one (1), tracking is enabled. This bit must be set to a logic one (1) to allow the external register to be updated. Ipsw - Bit 6 Interrupt Switch - This bit toggles the Interrupt Output between the Time of Day Alarm and the Watchdog Alarm. When set to a logic zero (0), the Interrupt Output is from the Watchdog Alarm. When set to a logic one (1), the Interrupt Output is from the Time of Day Alarm. Ibh/lo - Bit 5 Reserved - This bit should be set to a logic low (0). Pu/lvl - Bit 4 Interrupt Pulse Mode or Level Mode - This bit determines whether the Interrupt Output will output as a pulse or a level. When set to a logic zero (0), Interrupt Output will be a level. When set to a logic one (1), Interrupt Output will be a pulse. In pulse mode the Interrupt Output will sink current for a minimum of 3 ms. This bit should be set to a logic one (1). Wam - Bit 3 Watchdog Alarm Mask - Enables/Disables the Watchdog Alarm to Interrupt Output when Ipsw (Bit 6, Interrupt Switch) is set to logic zero (0). When set to a logic zero (0), Watchdog Alarm Interrupt Output will be enabled. When set to a logic one (1), Watchdog Alarm Interrupt Output will be disabled.
