参数资料
型号: MC68HC05V7CB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: SDIP-56
文件页数: 78/170页
文件大小: 980K
代理商: MC68HC05V7CB
SECTION 18: 05V7 BEHAVIOR DURING EMULATION
MOTOROLA
Page 155
MC68HC05V7 Specification Rev. 1.0
SECTION 18
05V7 BEHAVIOR DURING EMULATION
This section covers the functions of the MCU that behave differently during emulation using
either the 705V8/05V7 EVS or MMDS emulation systems. Since the 705V8/05V7 device
itself is used in the emulator system and operates in TEST mode, some extra software
operations must be performed to make the device behave as it will in the users application
(USER mode). The circuits which require special treatment are described in the sections
that follow.
18.1
COP
A value of $04 should be written to location $003F to enable the COP circuitry. The COP
circuit is defaulted off to allow ease of factory testing. It should be noted that enabling the
COP with this bit will enable the COP regardless of the state of the COPEN mask option.
18.2
MDLC
The MDLC requires bit 2 and 3 to be set in the MDLC Control Register ($0E) to allow normal
operation of the MDLC. If these two bits are not set during emulation the MDLC will not
transmit or receive.
18.3
REGULATOR
The voltage regulator should not be enabled in the device used in the top board of the
emulator system. This may result in a supply voltage contention and may overheat and
damage the emulator system.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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