參數(shù)資料
型號: MC68HC05C9ECP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 106/106頁
文件大?。?/td> 659K
代理商: MC68HC05C9ECP
MC68HC05C9E Advance Information Data Sheet, Rev. 0.1
Freescale Semiconductor
99
Appendix A
Self-Check Mode
A.1 Introduction
This appendix describes the self-check mode.Self-Check Mode
Self-check mode is entered upon the rising edge of RESET if the IRQ pin is at Vtst and the TCAP pin is
at logic 1.
A.2 Self-Check
The self-check read-only memory (ROM) at mask ROM location $3F00–$3FEF determines if the
microcontroller unit (MCU) is functioning properly.
These tests are performed:
1.
Input/output (I/O) — Functional test of ports A, B, and C
2.
Random-access memory (RAM) — Counter test for each RAM byte
3.
Timer — Test of counter register and OCF bit
4.
Serial communications interface (SCI) — Transmission test; checks for RDRF, TDRE, TC, and FE
flags
5.
ROM — Exclusive OR with odd ones parity result
6.
Serial peripheral interface (SPI) — Transmission test; checks for SPIF and WCOL flags
The self-check circuit is shown in Figure A-1.
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