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参数资料
型号： MC68HC705E6
厂商： 飞思卡尔半导体(中国)有限公司
英文描述： HCMOS Microcontroller Unit
中文描述： HCMOS微控制器
文件页数： 13/140页
文件大小： 788K
代理商： MC68HC705E6
MC68HC05E6 — Rev. 1.0
Modes of Operation and Pin Descriptions
For More Information On This Product,
Go to: www.freescale.com
Modes of Operation and Pin Descriptions
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.
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.
The
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
V
SS
V
DD
PC4
PC3
PC2
Mode
to
x
x
x
Single chip
2V
DD
1
1
1
0
1
1
1
0
1
EPROM bootloader
Verify only
Program 1 byte
Program 4 bytes
x = don’t care
1-pin
F
Freescale Semiconductor, Inc.
n
.
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