COP8SGE5_14 Datasheet, PDF (31/82 Pages) Texas Instruments – COP8SG Family 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

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Mode
1
2
TxC3
1
1
0
0
0
1
3
0
1
TxC2
0
0
0
0
1
1
1
1
TxC1
1
0
0
1
0
0
1
1
Description
PWM: TxA Toggle
PWM: No TxA Toggle
External Event Counter
External Event Counter
Captures:
TxA Pos. Edge
TxB Pos. Edge
Captures:
TxA Pos. Edge
TxB Neg. Edge
Captures:
TxA Neg. Edge
TxB Neg. Edge
Captures:
TxA Neg. Edge
TxB Neg. Edge
COP8SGE5, COP8SGE7, COP8SGH5
COP8SGK5, COP8SGR5, COP8SGR7
SNOS516E – JANUARY 2000 – REVISED APRIL 2013
Interrupt A
Source
Autoreload RA
Autoreload RA
Timer Underflow
Timer Underflow
Pos. TxA Edge
or Timer
Underflow
Pos. TxA
Edge or Timer
Underflow
Neg. TxA
Edge or Timer
Underflow
Neg. TxA
Edge or Timer
Underflow
Interrupt B
Source
Autoreload RB
Autoreload RB
Pos. TxB Edge
Pos. TxB Edge
Pos. TxB Edge
Neg. TxB
Edge
Neg. TxB
Edge
Neg. TxB
Edge
Timer
Counts On
t_C
t_C
Pos. TxA Edge
Pos. TxA Edge
t_C
t_C
t_C
t_C
Power Saving Features
Today, the proliferation of battery-operated based 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.
Each 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 wakeup
(MIWU).
Each device offers the user two power save modes of operation: HALT and IDLE. In the HALT mode, all
microcontroller activities are stopped. In the IDLE mode, the on-board oscillator circuitry and timer T0 are active
but all other microcontroller activities are stopped. In either mode, all on-board RAM, registers, I/O states, and
timers (with the exception of T0) are unaltered.
Clock Monitor, if enabled, can be active in both modes.
HALT MODE
Each device can be placed in the HALT mode by writing a “1” to the HALT flag (G7 data bit). All microcontroller
activities, including the clock and timers, are stopped. The WATCHDOG logic on the devices are disabled during
the HALT mode. However, the clock monitor circuitry, if enabled, remains active and will cause the WATCHDOG
output pin (WDOUT) to go low. If the HALT mode is used and the user does not want to activate the WDOUT
pin, the Clock Monitor should be disabled after the devices come out of reset (resetting the Clock Monitor control
bit with the first write to the WDSVR register). In the HALT mode, the power requirements of the devices are
minimal and the applied voltage (V_CC) may be decreased to V_r (V_r = 2.0V) without altering the state of the
machine.
Each device supports three different ways of exiting the HALT mode. The first method of exiting the HALT mode
is with the Multi-Input Wakeup feature on Port L. The second method is with a low to high transition on the CKO
(G7) pin. This method precludes the use of the crystal clock configuration (since CKO becomes a dedicated
output), and so may only be used with an R/C clock configuration. The third method of exiting the HALT mode is
by pulling the RESET pin low.
Copyright © 2000–2013, Texas Instruments Incorporated
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Product Folder Links: COP8SGE5 COP8SGE7 COP8SGH5 COP8SGK5 COP8SGR5 COP8SGR7