參數(shù)資料
型號(hào): MC68HC05PD6
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 108/165頁
文件大小: 841K
代理商: MC68HC05PD6
July 7, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05PD6
LOW POWER MODES
MOTOROLA
REV 1.1
6-1
SECTION 6
LOW POWER MODES
The MC68HC05PD6 has two operating modes: Single-Chip (Normal) Mode, and
Self-check Mode. The Single-Chip Mode is the normal operating mode for the
MCU. The mode of operation is determined by the logic state on PC6 and PC7
pins, and the voltage on VPP on the rising edge of the external RESET input.
6.1
SINGLE-CHIP (NORMAL) MODE
The Single-Chip Mode allows the MCU to function as a self-contained
microcontroller, with maximum use of the pins for on-chip peripheral functions.
In the Single-Chip Mode all address and data activity occurs within the MCU and
is not available externally. Single-Chip Mode is entered if the VPP pin is within the
normal operating voltage range when the rising edge of a RESET. In Single-Chip
Mode, all I/O port pins are available.
6.2
SELF-CHECK MODE
The self-check program is mask at location $FE00 to $FFDF, and is used for
checking device functionality under minimum hardware support.
6.3
LOW-POWER MODES
In each of its conguration modes the MCU is capable of running in one of several
low-power operating modes. The WAIT and STOP instructions provide two modes
that reduce the power required for the MCU by stopping various internal clocks
and/or the oscillator. The ow of the STOP, and WAIT modes are shown in
Table 6-1. Operating Mode Initialization
MODE
RESET
PC7/IRQ1
PC6/IRQ2
VPP
Single-Chip (Normal)
VSS to VDD
Self-Check
VSS
VDD
VTST
VTST=2 x VDD
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