參數(shù)資料
型號(hào)： MC68HC05P4A
廠商： Motorola, Inc.
英文描述： 28-pin MCU (microcontroller unit) based on the MC68HC05P4(28引腳、基于MC68HC05P4升級(jí)的8位微控制器單元)
中文描述： 28引腳單片機(jī)（微控制器）的基礎(chǔ)上MC68HC05P4（28引腳，基于MC68HC05P4升級(jí)的8位微控制器單元）
文件頁(yè)數(shù)： 67/102頁(yè)
文件大?。?/td> 930K
代理商： MC68HC05P4A
MC68HC05P4A — Rev. 6.0
Advance Information
MOTOROLA
Self-Check Mode
67
Advance Information — MC68HC05P4A
Section 10. Self-Check Mode
10.1 Contents
10.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
10.3
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
10.2 Introduction
The self-check program resides at mask ROM (read-only memory)
locations $1F00 to $1FEF. This program is designed to check the part’s
functionality with a minimum of support hardware. The computer
operating properly (COP) subsystem is disabled in the self-check mode
so that routines that feed the COP do not exist in the self-check program.
10.3 Functional Description
The self-check mode is entered on the rising edge of RESET if the IRQ
pin is driven to double the supply voltage and the TCAP/PD7 pin is at
logic 1. RESET must be held low for 4064 cycles after power-on reset
(POR) or for a time, t
RL,
for any other reset. After reset, the input/output
(I/O), random-access memory (RAM), ROM, timer, simple serial
input/output port (SIOP), and interrupts are tested. Self-check results
(using light-emitting diodes (LEDs) as monitors) are shown in
Table 10-1
.
It is not recommended that the user code use any of the
self-check code. The self-check code is subject to change at any time
to improve testability or manufacturability.
Figure 10-1
illustrates a self-check circuit.
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MC68HC05P6_1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
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