Rainbow-electronics ATtiny26L Manual de usuario descargar pdf (Pagina 39)

ATtiny26(L)

1477B–AVR–04/02

Notes: 1. Each line represents a bit or fuse combination which enables the function.

2. A fuse value of “0” is programmed, “1” is unprogrammed.

MCU Control Register –

MCUCR

The MCU Control Register contains control bits for general MCU functions.

• Bits 7 – Res: Reserved Bit

This bit is a reserved bit in the ATtiny26/L and always reads as zero.

• Bit 6 – PUD: Pull-up Disable

When this bit is set (one), the pull-ups in the I/O ports are disabled even if the DDxn and

PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See

“Configuring the Pin” on page 91 for more details about this feature.

• Bit 5 – SE: Sleep Enable

The SE bit must be set (one) to make the MCU enter the Sleep mode when the SLEEP

instruction is executed. To avoid the MCU entering the Sleep mode unless it is the pro-

grammers purpose, it is recommended to set the Sleep Enable SE bit just before the

execution of the SLEEP instruction.

• Bits 4,3 – SM1/SM0: Sleep Mode Select Bits 1 and 0

These bits select between the four available Sleep modes, as shown in the following

table.

For details, refer to the paragraph “Sleep Modes” below.

• Bit 2 – Res: Reserved Bit

This bit is a reserved bit in the ATtiny26/L and always reads as zero.

PB4 XTAL1, clock source FUSE[PLLCK,CKSEL]

FUSE[PLLCK,CKSEL]

10000

10101-11111

PB5 XTAL2, clock source FUSE[PLLCK,CKSEL] 11001-11111

PB6 External interrupt

TC0 clock

GIMSK[INT0],MCUCR[ISC01,ISC01]

TCCR0[CS02,CS01]

100

PB7 RESET RSTDISBL FUSE 1

Table 17. Alternative Functions (Continued)

Pin Alternate Function

Control Register[Bit Name] which

set the Alternate Function

(1)

Bit or Fuse

Value

(2)

Bit 76543210

$35 ($55) – PUD SE SM1 SM0 – ISC01 ISC00 MCUCR

Read/Write R R/W R/W R/W R/W R R/W R/W

Initial Value 0 0 0 0 0 0 0 0

Table 18. Sleep Modes

SM1 SM0 Sleep Mode

0 0 Idle mode

0 1 ADC Noise Reduction mode

1 0 Power-down mode

1 1 Standby mode

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 150 151

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics ATtiny26L Manual de usuario Pagina 39

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics ATtiny26L