參數(shù)資料
型號: MC68HC08LT8CFGE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, ROHS COMPLIANT, MS-026BCB, LQFP-44
文件頁數(shù): 49/156頁
文件大小: 1107K
代理商: MC68HC08LT8CFGE
Development Support
MC68HC08LT8 Data Sheet, Rev. 1
142
Freescale Semiconductor
15.3 Monitor Module (MON)
The monitor module allows complete testing of the microcontroller unit (MCU) through a single-wire
interface with a host computer. Monitor mode entry can be achieved without use of the higher test voltage,
VTST, as long as vector addresses $FFFE and $FFFF are blank, thus reducing the hardware
requirements for in-circuit programming.
Features of the monitor module include:
Normal user-mode pin functionality
One pin dedicated to serial communication between MCU and host computer
Standard non-return-to-zero (NRZ) communication with host computer
Standard communication baud rate (9600 @ 2.4576-MHz internal operating frequency)
Execution of code in random-access memory (RAM) or ROM
ROM security feature(1)
Use of external 4.9152MHz or 9.8304MHz oscillator to generate internal operating frequency of
2.4576 MHz
Normal monitor mode entry if VTST is applied to IRQ
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the ROM difficult for
unauthorized users.
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