參數(shù)資料
型號: MC68HC705E6VFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 35/140頁
文件大?。?/td> 1584K
代理商: MC68HC705E6VFB
MC68HC05E6 — Rev. 1.0
Modes of Operation and Pin Descriptions
Contents
Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Modes of operation
The MC68HC05E6 operates in single chip mode only.
The
MC68HC705E6 has two modes of operation; single chip and EPROM
bootloader mode. Table 1 shows the conditions required to enter the
EPROM modes of operation on the rising edge of RESET.
Single chip mode
This is the normal operating mode of the MC68HC05E6. In this mode the
device functions as a self-contained microcomputer (MCU) with all
on-board peripherals, including the 8-bit I/O ports (A, B, C and D) and
the 4-bit input-only port (G), available to the user. All address and data
activity occurs within the MCU.
Single chip mode is entered on the rising edge of RESET if the voltage
level on the IRQ pin is within the normal operating range.
Table 1 MC68HC705E6 operating mode entry conditions
RESET
IRQ/VPP
PC4
PC3
PC2
Mode
VSS to
VDD
x
Single chip
2VDD
101
EPROM bootloader
Verify only
1
0
Program 1 byte
1
Program 4 bytes
x = don’t care
1-pin
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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