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COP8CCR9IMT7/NOPB Datasheet(PDF) 48 Page - Texas Instruments |
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COP8CCR9IMT7/NOPB Datasheet(HTML) 48 Page - Texas Instruments |
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48 / 111 page  COP8CBR9, COP8CCR9, COP8CDR9 SNOS535I – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Table 5-14. Timer Operating Modes Interrupt A Source Interrupt B Source Timer Counts Mode TxC3 TxC2 TxC1 Description On 1 0 1 PWM: TxA Toggle Autoreload RA Autoreload RB tC or MCLK 1 1 0 0 PWM: No TxA Toggle Autoreload RA Autoreload RB tC or MCLK 0 0 0 External Event Counter Timer Underflow Pos. TxB Edge TxA Pos. Edge 2 0 0 1 External Event Counter Timer Underflow Pos. TxB Edge TxA Neg. Edge 0 1 0 Captures: Pos. TxA Edge Pos. TxB Edge tC or MCLK TxA Pos. Edge or Timer TxB Pos. Edge Underflow 1 1 0 Captures: Pos. TxA Neg. TxB tC or MCLK TxA Pos. Edge Edge or Timer Edge TxB Neg. Edge Underflow 3 0 1 1 Captures: Neg. TxA Pos. TxB tC or MCLK TxA Neg. Edge Edge or Timer Edge TxB Pos. Edge Underflow 1 1 1 Captures: Neg. TxA Neg. TxB tC or MCLK TxA Neg. Edge Edge or Timer Edge TxB Neg. Edge Underflow 5.12 Power Saving Features Today, the proliferation of battery-operated applications has placed new demands on designers to drive power consumption down. Battery operated systems are not the only type of applications demanding low power. The power budget constraints are also imposed on those consumer/industrial applications where well regulated and expensive power supply costs cannot be tolerated. Such applications rely on low cost and low power supply voltage derived directly from the “mains” by using voltage rectifier and passive components. Low power is demanded even in automotive applications, due to increased vehicle electronics content. This is required to ease the burden from the car battery. Low power 8-bit microcontrollers supply the smarts to control battery-operated, consumer/industrial, and automotive applications. The device offers system designers a variety of low-power consumption features that enable them to meet the demanding requirements of today's increasing range of low-power applications. These features include low voltage operation, low current drain, and power saving features such as HALT, IDLE, and Multi-Input Wake-Up (MIWU). This device supports three operating modes, each of which have two power save modes of operation. The three operating modes are: High Speed, Dual Clock, and Low Speed. Within each operating mode, the two power save modes are: HALT and IDLE. In the HALT mode of operation, all microcontroller activities are stopped and power consumption is reduced to a very low level. In this device, the HALT mode is enabled and disabled by a bit in the Option register. The IDLE mode is similar to the HALT mode, except that certain sections of the device continue to operate, such as: the on-board oscillator, the IDLE Timer (Timer T0), and the Clock Monitor. This allows real time to be maintained. During power save modes of operation, all on board RAM, registers, I/O states and timers (with the exception of T0) are unaltered. Two oscillators are used to support the three different operating modes. The high speed oscillator refers to the oscillator connected to CKI and the low speed oscillator refers to the 32 kHz oscillator connected to pins L0 & L1. When using L0 and L1 for the low speed oscillator, the user must ensure that the L0 and L1 pins are configured for hi-Z input, L1 is not using CKX on the USART, and Multi-Input Wake-up for these pins is disabled. A diagram of the three modes is shown in Figure 5-13. 48 Functional Description Copyright © 2000–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9 |
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